Make version info globally available on both server and client
* added 2 functions: getVersion and getBuildTime to bkConfig
* added 1 REST endpoint for getting version info (version number and build time) and made it available through bkUtils
* version and buildTime strings are recorded to the $rootScope during module run phase
Make version and buildTime available through global variable 'beaker'
Fix #239, report beaker version number to Google Analytics
Merge pull request #338 from twosigma/fix-239

Fix 239, report beaker version number to Google Analytics