[infoscanner] don't read into archives when looking for trailers
[infoscanner] don't do a CDirectory::Exists() check when we set a path hash to empty - it's expensive for some VFS filesystems, and it doesn't matter if we add non-existent paths to the database (should SetPathHash ever be called on a non-existent path)
[infoscanner] don't invalidate paths whenever DeleteMovie() is done if all we're doing is updating details in-place
Merge pull request #3898 from koying/fix3droidios

FIX: TAB 3D fixup for ios & libstagefright
fixed: add GIF as known header to cximage.
changed: pass detected image mimetype further down to avoid a second lookup.
imagefactory: removed unused method.
Merge pull request #3906 from xhaggi/skin-epg

[confluence] adds info area for current selected epg item
[db] changed implementation of DeleteValues()
[db] get rid of FormatSQL() and use PrepareSQL() instead
[db] fix: adds missing close dataset in CPVRDatabase
Merge pull request #3919 from jmarshallnz/number_labels

Allow use of $NUMBER[] to specify a number in XML tags
Merge pull request #3956 from jmarshallnz/import_speedups

Video library: Import speedups
Merge pull request #3953 from jmarshallnz/date_time_validation

Date time validation
Support uClibc compilation

partly based on aports from Alpine Linux:
http://code.ohloh.net/file?fid=Up3lAbVglPtyupfNPazFHQYMKM8&cid=Sr-nRbkkE8E&s=&fp=302485&mp=&projSelected=true#L0
Merge pull request #3923 from popcornmix/cosmetic_log

[rbp/omxplayer] Cosmetic: Avoid DVDPlayer in logging message
Merge pull request #3874 from xhaggi/pvr-database

[db] improve/remove of pvr related database methods
Merge pull request #3939 from popcornmix/reenc_orient

[rbp/omxplayer] When reencoding thumbnails preserve orientation
Merge pull request #3871 from gfto/fix-compile-errors2

Fix two compilation errors.
[epg] handle <onback> just like every other control