Merge pull request #34 from jrmontag/master

Twitter field extractors, custom output template module, and a unit testing framework for publisher modules
Foursquare-related changes:
1) added testing suite for fsq
2) bugfixes related to FsqacsCSV ctor arguments
3) minor typo-fixes in README
Added singleton to base classe
Added tumblr test suite
Fixed typo in acscsv/test_stocktwits_native.py
Merge pull request #35 from jeffakolb/master

Foursquare-related changes:
Fixed null as value problem with location:geo:type key list
expanded fsq test suite
test module complete
updated FSQ test suite
updated Tumblr test suite
Merge pull request #36 from jeffakolb/master

Updated Foursquare and Tumblr test suites
newsgator and WP tests, plus bug fixes in their modules. bug fix in KeyPath in acscsv
Merge pull request #37 from fionapigott/master

newsgaotr and wp test modules + bug fixes
Simple running tests and some timing comparisons
Running tests
Merge branch 'singleton'
Typos and minor updates; experimentation with profiling and numba performance inhancements
added label attr to acscsv._Field
merge commit for acscsv._Field label addition
bugfix in acscsv/acscsv.py