pass Tile::ID by const ref
remove unused and unimplemented method
fix xtest target - closes #520 - longer term fix at #519
remove regex/boost regex usage
Merge pull request #521 from mapbox/no-boost-regex

Remove libboost_regex usage
customize concurrent JOBS per compiler/platform
restructure Makefile to avoid concurrent makefile generation
use the correct makefile names for building the project
fix standalone_product_dir path
Merge branch 'master' of github.com:mapbox/mapbox-gl-native
fix #522
Merge branch 'master' of github.com:mapbox/mapbox-gl-native into jobs
remove -lboost_regex from linker flags, followup to #521
Merge pull request #524 from mapbox/jobs

Jobs
attemp to fix #525
double JOBS
remove distclean (now that we've ported to mason and re-installs are fast)
remove distclean mention in the readme
aeroway_fill - ensure we fill polygons only
remove directories from ignores