minor Greek translation correction

minor Greek translation correction for SignIt button.
Merge pull request #6 from sotirop/patch-1

minor Greek translation correction
Better error message for timestamp failures.

Also, fix a typo in there.
Use itxt from underlying folder
Remove references for unused libraries
Delete unused JARs
Add JSignPdf Quick Start Guide
Read password from stdin if not given in command line
Update to 20.10.2014