Added quick vagrant
changes to readme around testing
add php to provision on test environment.
removing the vagrant directory
use the new vagrant support submodule
bump vagrant submodule
made submodule link use public url instead of ssh
update for PSR-4
Merge pull request #28 from triplepoint/feature/update-for-psr4

update for PSR-4
revise unit of measure construction, clean up quantity classes.
fix instances of 'use \' according to php standards
psr standards
dropping php 5.3 support over the 'callable' typehint
expanded the readme a bit
make failing php 5.6 tests not optional.  Bump phpunit dependency version.  fix weird travis phpunit call
replace array() with [].  Fix a logic mistake in naming the fromNativeUnitFactor variable.
updated README for readability
general cleanup
remove references to gitapidoc.com