ensure homebrew path does not come first
bump node 0.10.30->0.10.31 and libuv 0.11.28->0.11.29
upgrade boost from 1.55->1.56
add nunicode (https://bitbucket.org/alekseyt/nunicode)
[skip ci]
JOBS=1 for mapnik
Merge branch 'master' into libuv-pkgconfig