Issue 66 Do not set a default build-dir if running recursively

When running recursively, the src directories are spread throughout a
directory structure and the build directories need to be relative to their
prospective src directories.
bumped travis build for 0.10
added quotes
Merge branch 'master' of git://github.com/twobit/shifter into twobit-master
Removing old lint preferred option as it's no longer used