Fix #125, put media sync to background job

[aidewoode]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 1993104930

• 69 of 80 (86.25%) changed or added relevant lines in 15 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 96.689%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
app/controllers/albums_controller.rb	0	1	0.0%
app/controllers/artists_controller.rb	0	1	0.0%
app/controllers/playlists_controller.rb	0	1	0.0%
app/controllers/settings_controller.rb	4	5	80.0%
app/models/media.rb	28	29	96.55%
app/controllers/users_controller.rb	0	2	0.0%
app/controllers/application_controller.rb	2	6	33.33%

Files with Coverage Reduction	New Missed Lines	%
app/models/user.rb	1	93.75%

Totals
Change from base Build 1954646920:	-0.2%
Covered Lines:	730
Relevant Lines:	755

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💛 - Coveralls