This forces offset lines to be aligned to the closest point to
the anchor point on the original line, meaning that they are
aligned where the offset line and original run parallel, or nearly
so.
- Implementation by @herm for GSOC 2012 (http://mapnik.org/news/2012/10/06/gsoc2012-status9/)
- C++11 port, improvements, optimizations by @artemp
- Testing and integration with master by @springmeyer
- Thank you to all the support from @behdad along the way
- Thanks for help testing @toton6868, @stephankn, @nirvn, @mfrasca, @simonsonc and many others
Refs: #2073,#2070,#2038,#2037,#1953,#1820,#1819,#1714,#1634,#1547,#1532,#1319,#1208,#1154,#1146
