updates gtk deps and crates.io version

• update dependencies
• updates gtk deps
• updates clap
• updates env_logger
• updates regex
• update toml
• updates clap
• fix regex update
• update changelog

Update for GTK-rs changes

This release add the ability to override the entire design of the app by creating and editing one or both of the following files:

~/.config/rrun/rrun.glade
~/.config/rrun/style.css

It also contains the necessary command line interface required for caching completions.

With much help from @nightscape , this release adds a configuration file to easily define new completions.
rrun has become much more flexible now!

• Switched from gtk::SearchEntry to gtk::Entry to lower the dependency on GTK 3.10+.
• This makes rrun build on travis again.
• Also rrun builds in Rust Beta and, thus, should also run with the Rust final.

• add buildpackage commands to Makefile
• change tag version format
• Update README.rst
• repair travis image
  which is still red anyway..
• add debian package files
• update to latest rust
• add build dependency versions
• remove examples
• updater copyright

• Requires bash
• Supports adding to the history through "history -s" in bash
• prevents "compgen" calls from cluttering the history