style: in preparation for bootstrap, replace kallithea title class with bootstrap compatible panel-heading This is a subset of a bigger changeset. The subset was extracted by Mads Kiilerich, mostly by: sed -i 's,<div class="title\>,<div class="panel-heading,g' `hg mani` sed -i 's,\<div\.title\>,div.panel-heading,g' kallithea/public/css/style.css

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.