Added Gitter badge
Merge pull request #24 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md
updated readme
added semicolons to macros
updated readme
code cleanup
fixes issue Kintaro/wtftw#25
added ability to kill clients. solves issue Kintaro/wtftw#27
updated config example to include client kill
Update Cargo.toml
replaced treemap with btreemap and updated deprecated spawn
added support for mouse motion events and floating windows
closes Kintaro/wtftw#30