Allow use of sentry in a subfolder behind web proxy

cribbed from here: https://gist.github.com/j4mie/1778918

Add default empty value for force_script_name attribute
mysql 5.4 cookbook has breaking changes

Correct metadata dependency formatting

Properly quote script location
Merge pull request #5 from jameslegg/hide-behind-nginx

Hide behind nginx
only set FORCE_SCRIPT_NAME if it's configured
Use python_pip resource instead of execute to install sentry

  - add options hash to allow 'dev' version to be installed
  - add more memory to vagrant VM so that it can be tested
Minor version bump as we added the feature to install from dev
Merge pull request #6 from jameslegg/less-executions-more-ram

Less executions more ram
Merge remote-tracking branch 'will/master' into workers

Conflicts:
	metadata.rb