Many improvements.

Added:
- License GPL 2.0.
- Configuration settings for date format and notice on ACP index page.
- Non-irritating timer instead of green line.
- FontAwesome including CDN version.

Fixed:
- SQLite error with UNION query.
- Indentation fixes.

Edited:
- Composer.json.

Screenshots:
Cron status page.
![cron_status_timer](https://cloud.githubusercontent.com/assets/7805635/3781688/2de07f02-1999-11e4-996f-a0da2d4da277.png)

Board settings page.
![cron_status_config](https://cloud.githubusercontent.com/assets/7805635/3781687/2dddcc44-1999-11e4-8423-3a1e0a4f93d5.png)