Added support to extract mp4 videos from Movies folder
Saving videos on database

The previous commit doesn't save the videos on database, now they are.

We too have changed some methods to work with the MultimediaContent class, a
superclass for, eg., Audio and Video, instead its subclasses.
Extract similar commands in sync_video and sync_audio methods to a new method in Manager class
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Merge pull request #1 from rbonifacio/master

Estrutura Latex do livro sobre MMUnB
Merge pull request #2 from adorilson/fix-video

Fix video
Merge pull request #3 from adorilson/fragmentation

Fragmentation
Merge pull request #4 from adorilson/development

Development
Merge pull request #5 from rbonifacio/master

Merge with blessed
[#17] Fixed the add a music to player

The activity version used startActicityForResult/onActivityResult
to treat get the music selected from list. With activity,
we used setTargetFragment/getTargetFragment to resolv this.

Some reference:
https://github.com/alexfu/TargetFragmentExample
http://stackoverflow.com/questions/13238959/how-to-get-button-clicks-in-host-fragment-from-dialog-fragment
Merge pull request #21 from adorilson/fix_issue_17_add_music_to_player

Fix issue 17 add music to player