CLN: Remove unused internal function
CLN: Remove useless test
TST: Add a test for GeoSeries to/from file
TST: Add tests for 'not in' GeoSeries
TST: Use unittest assertion methods
TST: add missing assertions
TST: Explicit skips of not yet implemented tests
TST: Assertions for expected exceptions
TST: Check that we are prevented from writing mixed types to file
BUG: Fix copy method for GeoSeries and GeoDataFrame
BUG: Use crs of transformed series in transformed frame
TST: Test for transforming GeoDataFrame
BUG: backport _propogate_attributes method from pandas master
BUG: GeoSeries can't use _data attribute with released pandas versions
Merge pull request #33 from kjordahl/test/test-coverage

Improve test coverage and fix copy and to_crs methods.