Fixed a bug that affects some characters

Fixed a bug that avoided the opening characters of the tokens to be used in the template. (Issue #2)

First GitHub release

This is the first release after migrating ITemplate from GJT.org website to GitHub.
The changes made were mainly these:

Translation of everything that was in Portuguese to English.
Changes in references to GJT, including the creator e-mail.
Creation of unit tests.
Some code modernization with new Java features since ITemplate was created.
Only one change in behavior: if a key in the template is not in the substitution HashMap, it used to substitute it with "null" and now it just removes the key and does not put anything in its place.
The licence is officially LGPLv3, the current LGPL version.