First pass at Florida loader

Only tested with 2012 results so far.

Addresses #86
Document data quirks and add new offices

Add data quirks to loader class docstring and add new offices
that I encounter as I look through data for 2010 and 2011.

Addresses #86
Merge branch 'dev' into 86-fl_loader
Adjust target offices, use unicodecsv

I think I originally misinterpretted "State Attorney" as
"Attorney General".  I think "State Attorney" is a race we're not
concerned with.

Use ``unicodecsv.DictReader`` with a "latin-1" encoding to read some
non-ASCII characters in some of the results.

Addresses #86
Update target offices

Add the agriculture comissioner to our target offices and add
the state senate offices to the list of offices that will have
a district.

Add logging messages for skipped offices to make sure our list is
complete.

Addresses #86
Add Florida offices to fixture

First pass at adding Florida offices.  I need to double-check
these with someone with more domain knowledge as well as against
the loaded data.

Addresses #86, #91
more wv correx
make clear that pre-2008 WV results are converted CSVs
remove statewide file from wv datasource
initial work on wv loader
Add Florida parties to fixture

Add parties encountered in Florida's raw results to the parties
fixture.

This opened up a number of questions about differentiating state
and national parties and whether to use state, FEC or our own
curated list of abbreviations.  I added a state field to indicate
which parties are state-specific, and to possibly differentiate
between same-named state-level parties.

I added additional abbreviation and name fields to the
``Party`` model to make the state and FEC abbreviations clear in
case a party in the state results was incorrectly mapped to an
FEC party.

I updated the Maryland transforms to use new Party abbreviations.
I'll likely have to write transforms to map some state-level
parties to canonical parties.

Addresses https://github.com/openelections/core/issues/91
Merge branch '86-fl_loader' into dev