doc: sentry logo and extras (#250)
* doc: sentry logo and extras

Merge branch 'develop'
* develop:
  Various AppVeyor fixes

Merge branch 'develop'
* develop:
  Added default value when there are no tags
  Back to Convert.ToBoolean since GetEnvironmentBoolean was protected
  AppVeyor with an uppercase V
  Fixes
  Use `AppVeyor.GetEnvironmentBoolean`
  Use `WithCriteria` instead of `return`
  Only build tags on master
  Add `Optimize` MSBuild property for .NET Core builds too
  Set the MSBuild `Optimize` property to `true`
  Moved all links to the footer
  Replaced TeamCity with AppVeyor

Merge branch 'develop'
* develop: (46 commits)
  Add NoOpRavenClient, an empty (no-op) empty implementation of IRavenClient.
  Updated `NuGetOrgApiKey`
  formatting
  formatting
  Fix nuget packages build to include metadata. Added MetaData to use new csproj format
  Run PowerShell directly and validate api key better
  Reintroduce acceptance criteria since secrets are unavailable in pull requests anyway
  Always accept criteria to test nuget push before merging
  Set the source
  Simplifications and clarifications
  Use NuGetPush instead of PublishNuGets
  Let's try NuGet.Push instead
  Another take on the .nupkg file glob
  Ensure the artifacts directory exists in the Package task
  Ensure the artifacts directory exists in UploadArtifacts
  Added NuGet.Core addin and removed ExtendedNuGetAliases prefix
  Explicit ToString()
  Prefix with ExtendedNuGetAliases.
  Use File() for glob pattern so it can be combined with ConvertableDirectoryPath
  Added Cake.ExtendedNuGet addin
  ...

Merge branch 'develop'
* develop: (90 commits)
  Fixing typo.
  Added initial doc about breadcrumbs.
  Demangle Anonymous Function Names
  Improve exception frame tests
  Demangle Function Name from Async Calls
  Solution reordering
  Updating configurations
  Fixing Build Configurations
  Targetframework dependency fix
  Refactoring # directives position
  Complementing the PR #149. Some tests case to ensure public assign from SentryEvent.Tags
  Web Test configurations
  Multiple code refactoring
  Fixing reference Newtonsoft targetFramework in .net 4.5 build
  Removing unnecessary variables. Removing inconsistent build configurations
  Changing NSubstitute targetFramework dependency on .net 4.5
  Adding missing using
  Using .net 3.5 way whenever it is possible
  Solution configurations
  Removing unnecessary usings
  ...

Merge branch 'develop'
* develop: (25 commits)
  Add back .NET 4.0 compatibility
  Verified tests
  Added test for ErrorLevel
  Skip ExceptionData of InnerException if it is empty
  Added back Unix guards
  Log level is not set on JsonPacket
  #114 Check if httpcontext is available and reuse properties from reflection.
  Upgraded GitVersionTask from v3.3.0 to v3.4.1
  Set the next version to 2.1
  Wrap async in !net40 regions
  Adjusted namespace and removed the RavenClient prefix of the RavenClient test classes
  Moved RavenClient tests into a RavenClientTests folder
  Added CaptureException tests
  Tidied up async tests
  Added Capture tests
  Added CaptureAsync() tests
  Merge tags in Capture(SentryEvent)
  Fixed InvokesSendAndJsonPacketFactoryOnCreate async test
  Set LastPacket in async as well
  Add CaptureMessageAsync tests
  ...

Merge branch 'develop'
* develop: (171 commits)
  Let's set the next version to 2.0
  Makefile: add `--debug' switch when running tests on mono in order to get better stack traces
  Fix a NRE in ExceptionFrame.cs when StackFrame.GetMethod() returns null
  Added documentation about the Exception.Data support
  Documenting the ErrorOnCapture property of SharpRaven.
  Fixed indentation in documentation
  I quite like var
  Added SentryEvent
  Add the net40 flag to SharpRaven.Nancy.UnitTests and check for it in the LogModule
  Added missing ticks in documentation
  Updated documentation
  Added docs to solution items
  Use CaptureMessageAsync() in the async Nancy test
  Changed the obsoleted CaptureEvent() methods to cause compile time warnings
  Change CaptureMessage() and its async counterpart to use IDictionary<,> instead of Dictionary<,>.
  Removed the Dsn parameter from RavenClient.SendAsync() so it's consistent with the Send() method.
  Fixed "messge" typo
  Casing matters
  How about Travis invoking make so we don't have to duplicate stuff in both make and Travis?
  Install NUnit.Runners v2.6.4 and update the path in the Makefile to reference the correct version.
  ...

Merge remote-tracking branch 'xpicio/hotfix/safest-getmodules-method'
* xpicio/hotfix/safest-getmodules-method:
  Try to fix exception "System.Reflection.RuntimeAssembly in _nLoad" when iis recycle is running and an error is fired to log on Sentry

Merge remote-tracking branch 'origin/support-release'
* origin/support-release:
  Support release attribute (fixes GH-76)

Merge branch 'develop'
* develop:
  Added Gitter chat icon to README. Closes #73