theme: fix invisible footnote element

Bootstrap's "label" CSS class is giving extra meaning to the
docutils "label" class, causing our footnote anchors to be made
invisible when there's more than one backref. Instead of making
label's meaning context-sensitive or trying to trick docutils into
applying an additional "label-info" class (which really gives us no
additional benefit and may not be possible anyway), I chose to just
rename Bootstrap's version of "label" to "bootstrap-label".

To the best of my knowledge we aren't using Bootstrap's label for
anything, but if we are, it's a trivial update.

Signed-off-by: Sam Kleinman <samk@10gen.com>
giza: fix command reference
giza: minor module organization
themes: new drivers theme
giza: add special publish target for sphinx builder
theme: suppress format selector in drivers theme
giza: make quick start more safe
giza: move make logic for publish target into giza
giza: fixing bootstrapping organization to make it more safe
BUMP 0.2.8
post 0.2.8
giza: quickstart cleanup
giza: fix json post-processing for multi-edition sites with excludes
whitespace
giza: fix publication of releases text
giza: remove unneeded logging message
make: update build system
giza: alternate solution to running json build with redacted files
giza: legacy content generation now supports lists of editions in content specifications
giza: new content generation to support list-based edition filtering