v0.5.1: Consistent naming

• Column names now are consistently english as are party names, etc.
• This will likely break previous code, as all code referencing column or party names must be changed

#koala17 launch release

• Version used at launch of #koala17 @KOALA_LMU
  coalitions_0.4.3.tar.gz

Last version before refactoring (tidying)

The last version before refactoring (rewrite to largely comply with tidyverse paradigm)