[Review] Request from 'vlewin' @ 'vlewin/timetrack/upgrading'

Please review the following changes:
  * 3764967 deploy to openshift
  * 8f5ec12 clean up
  * 45c5486 change tooltip position
  * 0a3b271 fix position of month switcher arrows
  * 3ad5deb disable autocomplete for email field
  * d7572bc fix today link
  * 0a30951 remove sample image
  * 70e3630 move screenshots to separate directory
  * 2845dfc increase size of month switchers
  * 142f7c7 fix tooltip and add delete button
  * 1f7a9cf code clean up
  * 823e7e5 new layout
  * c9454d8 upgrade to Rails 4.1