evanodell/parlitools: v0.1.0

Changes to vignettes to comply with CRAN policies and to reduce the time needed to check the package.

Reduction in the number of similar vignette examples to reduce build time.

Updating of council_data dataset to be accurate as of 2017-07-14.

New ge_2017 dataset, with results of 2017 General Election, linked with constituency data from bes_2015.

Consistent naming of vote variables in bes_2015.