use z0 parameters on z0
Add fwd decl to slash compile time
implements #872
re-enable cucumber tests on travis CI
compile on travis with the maximum number of cores
reverting back to two cores on travis
Some mild refactoring of the BinaryHeap code. style only
preparing call of turn penalty function
remove c-style calls to fabs
fix test regression
distinguish between left and right, thx @emiltin
fixes off-by-one and testing issue discussed in 889
Fix assertion in debug version

When running tests on FreeBSD 10 on debug verion I got boost assertion errors in mutex.hpp:79 . 

It seems that mutex unlock is not needed (it is already unlocked and behavior is undefined).
Fix comment typo

SharedDataFacade.h is for the shared memory case; old comment implied the opposite.
Merge pull request #906 from andrewbts/patch-1

Fix comment typo
fixes #907, segfault when ampersands where missing
install bundler without sudo, change Travis environment
fix yml syntax
explicit rvm use, workaround for Travis CI testing woes
install libpostgis-java to fulfil dependencies