Add slicing tool to the master branch

This patch added tools used for slicing and merging in translation process.
The patch also includes the POT files for each documents.
The PO files are not included, which can be downloaded from Transifex.

Fixes: bug #1153415
Change-Id: Ia455134c99acb1129e8f10deda0d85867b1ef9a3
Merge "Add slicing tool to the master branch"