Fixed to address potential exploits mentioned in exploit-db.com/exploits/18652/
Updating version number to reflect SP1.
Fix for issue #337

The bug in question where the time value for the cloned page adds a
bunch of numbers to the end (actually the UNIX time) is actually not
SQLite specific.

Due to the way the Page model handles "created_on_time", it appended
the unix time to the end of "created_on". This variable looks to be a
remnant from an earlier one related to the fork from FrogCMS(?).

It only manifested itself in SQLite because SQLite does not enforce
column types strictly, whereas in MySQL the extra numbers are discarded
by the DB, SQLite stores them as a string.

Removing the offending lines fixes the issue and does not change the
functionality of clone().
Updated nestedSortable.js to current version (1.3.5)
Updated Markdown (1.0.1o), MarkdownExtra (1.2.5)
Activate MarkdownExtra (changelog)
Added travis continues integration config file
Updating travis ci config file
Update to travis ci file
Update to remove sqlite from travic ci config file
Small tweak to travis ci yml file
Fixing travis ci file
Changing phpunit call in travis ci file
Updating travisci config file
Correcting travis-ci file
Added notifications to travis ci config file
Fixed small issue in travis ci config file
Updated travis file with corrected notifications.
Tweaking travis ci
Remove travis-ci notifications