merged session-manager branch with master
merged with updated master branch
added simple css styles to options page
merged with options page branch
merged with updated master branch
whitelist now only blocks requests for the main_frame, not additional assets
added listeners to whitelist for updates to chrome local storage variables, reorganized methods, and added init method
Merge branch 'whitelist'
Merge branch 'master' into session-manager
added listener to update timeout inteveral when changed in options, and init function