Make html (jinja2 by default) the default renderer, added semi-silent ignoring if the default renderer is set to an invalid value, added a logger property which tries to decide a logger to use semi-intelligently
Make html (jinja2 by default) the default renderer, added semi-silent ignoring if the default renderer is set to an invalid value, added a logger property which tries to decide a logger to use semi-intelligently

teozkr/Flask-Pushrod,teozkr/Flask-Pushrod,UYSio/Flask-Pushrod