added project select and in the middle of billable option
fixed reporting of billable/not billable according to project settings
removed unused attribute from select option
Merge pull request #5 from rubinsh/master

Added the ability to select a project, and report billable/non billable according to the project's default settings
JSLint
Merge branch 'master' into github-projects

Conflicts:
	scripts/background.js
	scripts/common.js
	styles/style.css