Added the ability to assign one doc to the multiple languages (allowed multiple values on Languages field).

> Created the default "Keywords" profile document.

> Added total column in the "Code by language" view.

> Created the view that shows the docs created in the last 30 days.

> Created the view that shows the docs modified in the last 30 days.

> Created the view that shows all docs categorized by year \ month \ day created.

> Modified the design of action bar of all view's and forms.

> Added action Save and action Close on all forms.

> Added "Agent" option in the Type field of the main form (for LS).