..................
Bugfixes:
- extensions package import issues
- JINJA2_[DJ]J_EXTS handling:
* an exception is raised if the value is not a list or tuple
* file extensions tolerate leading dot
* clarified documentation
- issues with Python 3
Documentation:
- added previously missing doc relative to jj_global and jj_filter decorators
and JINJA2_FROM_MODULE setting value