Make helpex to be able to work with more xhp files at one time
- Add new input flag "-mi" which means multiinput
- Input is a file include pathes to xhp files
(these are in the same directory so their strings
are in the same po file)
- Output is a file include pathes to dest xhp files
- Merge reads all po entry from the specified po file
if MergeDataFile ctor's second parameter is empty
Rewrite makefiles to work with new syntax
Plus Delete some unused code
Change-Id: I5eb12d7a6f5e9cda378788410d3c50052eb752b8
5d84ae59e7