Multi-monitor support

Multiple monitors are now supported.
Smooth dimming transition

- added smoothing for changing dimness
- changed menus to simple menu items
- fixed bug where FormClosing event prevented system shutdown
Added command line support

Command line support
Restart command in menu
New icon
Moved brightness menu items outside

Enabled both right and left click
Created TRAVIS.yml
Rename .TRAVIS.yml to .travis.yml
Added preview and readme with build status
Merge pull request #1 from jaywick/master

Multi-monitor support