Update license for 2014 data
Add 2014 data, upgrade topojson
LV03 also for 2014 source data
Ignore zip dir
Bump topojson dependency
Add PLZ data, rename zip/ to downloads/
Add PLZ topojson
Treat all targets as secondary

See http://www.gnu.org/software/make/manual/make.html#index-preserving-with-_0040code_007b_002eSECONDARY_007d-234
Remove need for top-level tmp dir
Use topojson-group
Remove tmp
Merge lakes
Use two passes: first create unscaled topologies, then combine + scale + simplify. Fixes #7
Of course, we can also combine layers directly from the shapefiles. No need for multiple passes through topojson!
Add 2014 VEC200 data
Upgrade topojson
Ignore build
Use VEC200 data
Reorganize
Write intermediary files to build/, fix contours