Updated Gradle info

Extracted context info from XLIFF 1.2 files

Removed debug output

Improved support for XLIFF 1.2 from Articulate and validation of XLIF…

…F 2.x

Fixed extra linefeed

Added support for excel tables

Add release note for version 4.9.1

Add release notes for version 4.9.0

Update README.md

Updated README.md