Adds i2libdash first commit
Adds i2libisoff.c and refresh headers
Updates contexts
TVRING-191: basic functions and parameters were added
Merge branch 'i2libdash' of http://stash.i2cat.net/scm/TVRIN/dashsegmenter into i2libdash
TVRING-191: starting with the implementation
TVRING-191: starting with the implementation
TVRING-191: Adds avc_header and change type of width and height in i2ctx_video
TVRING-191: Implements some functions
TVRING-191: ftyp implementation
Merge branch 'i2libdash' of http://stash.i2cat.net/scm/TVRIN/dashsegmenter into i2libdash

Conflicts:
	i2libdash/i2libisoff.c
TVRING-191: ftyp implementation done
TVRING-191: Fixes bugs
TVRING-191: moov implementation done
Merge branch 'i2libdash' of http://stash.i2cat.net/scm/TVRIN/dashsegmenter into i2libdash
TVRING-191: moov implementation done
TVRING-191: Implements write_tfhd and write_mfhd
TVRING-191: Adds index to i2ctx_sample
Merge remote-tracking branch 'origin/i2libdash' into i2libdash
TVRING-191: upgrades context