Break long word in sidebar.
Move .wordbreak into #sidebar.
Move sidebar sublist into nested lists. Fixes #47.
Straightens out spacing for nested list-group-items.

The list-group class has a fairly extensive margin at the bottom. If we nest
list groups within list group items, this and the padding of list group items
result in excessive spacing between one nested group to the next. This fixes
that in regard to #47.
Adds ids to sublists in sidebar & example for use.

This allows one to control the style of sublists in the sidebar individually.
The example adds a small amount of spacing between icon and icon label in the
SOCIAL sublist. Thanks to @DandyDev for the suggestion.
Remove unused class.
Adds classes used by reStructuredText

Adapts @hlapp changes to work with HTML generated by .rst files and adds
an .floatcenter/.align-center class.
Fix typo

Fix typo in figure.floatcenter
Refactored GitHub repo component and brought it in line with recent sidebar changes
Merge branch 'word-break' of https://github.com/marlboromoo/pelican-bootstrap3 into marlboromoo-word-break

* 'word-break' of https://github.com/marlboromoo/pelican-bootstrap3:
  Remove unused class.
  Move .wordbreak into #sidebar.
  Break long word in sidebar.
Merge pull request #59 from magnunleno/fix-figures-rst

Adds classes used by reStructuredText
Customize HTML blocks in sidebar.
Merge branch 'htmlblock' of https://github.com/marlboromoo/pelican-bootstrap3 into htmlblock