Use search field instead of text field

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Add some semantic to our html

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Remove ProjectActivityCacheObserver
Remove UsersGroup observer
Fix event creation
Remove project observer
Remove NotesObserver
Remove SystemHook observer
Remove user observer
Remove rails observers from application
Fix user notifications
Fix project deletion and tests
Fix notes creation via API

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix search tests

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Add tabindex -1 to skip on tabbing.
Move Go header to the top of the head to work around broken Go parsing.
Move basic header styles to theme file

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Move commit css to commits section. Remove box-shadow for text fields to match global style

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Replace bg_style_color with bg_primary

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
People report that 2GB of swap on Digital Ocean also does the trick.