[Merge] lp:~phablet-team/qtubuntu-camera/add-time-to-filename into lp:qtubuntu-camera

[Bill Filler]

Review: Needs Fixing

tested and discussed with Ugo. The generated filename should be simplified as it contains a mix of . and _ and is quite long.

Simplified version should be this:
yyyyMMdd_HHmmssms and we can drop the counter at the end (i.e. 0001) because the second part of the filename will have the time down to the millisecond which should cause uniqueness even if burst mode is used
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https://code.launchpad.net/~phablet-team/qtubuntu-camera/add-time-to-filename/+merge/234100
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