issue2551179 Load config_ini.ini ... recognize minimal template demo.py Mostly taken from patch by John Kristensen (jerrykan). Tests for python3 and 2 created for minimal and jinja2 templates. Removed FIXME for special case config settings for jinja and responsive templates. config_ini.ini mechanism makes it obsolete. Demo removes config_ini.ini file in home directory. Also remove encoding of utf-8 from initial_data.py to remove SyntaxError: encoding declaration in Unicode string under python2.

<!--
 This is the default body that is displayed when people visit the
 tracker. The tag below lists the currently open issues. You may
 replace it with a greeting message, or a different list of issues or
 whatever. It's a good idea to have the issues on the front page though
-->
<span tal:replace="structure python:db.issue.renderWith('index',
    sort=[('-', 'activity')], filter=['status'],
    columns=['activity','title','creator'],
    filterspec={'status':['1','2','4']})" />