Minor update to django-firebird 1.6 (only works with django 1.6.x)

Maximiliano Robain  announced on django-firebird devel group :

Hi everyone,
I did just a little update on stable/1.6.x branch and a new release django-firebird v1.6.3. It includes a really minor fix on how catch and reraise exceptions and includes support for PEP 440 necessary to support PyPI updates.
The plan right now is to resume django 1.7 support (develop branch) and then continue with support for django 1.8 .

The idea is fix and close all open issues before merge it with master branch (now master branch == stable/1.6.x branch)
Any feedback is wellcome.