Prepend brew-cask dirs to $LOAD_PATH (not append)

Found while investigating #2275, but probably not a fix, just a sensible
change. Depending on version of ruby interpreter, previous code could
cause brew-cask paths to came later than current dir "." in $LOAD_PATH,
leading to unpredictable behavior in the wild.
add milkytracker
node-webkit 0.8.4
Merge pull request #2365 from ndr-qef/node-webkit

node-webkit 0.8.4
Merge pull request #2341 from rolandwalker/prepend_load_path

Prepend brew-cask dirs to $LOAD_PATH (not append)
moved league of legends to Casks dir
Merge pull request #2366 from vitorgalvao/correct-league-of-legends

moved league of legends to Casks dir
Merge pull request #2367 from yyolk/milkytracker

Cask for Milkytracker
Android Studio 0.4.2 build 133.970939
Merge pull request #2368 from selesse/android-studio

Android Studio 0.4.2 build 133.970939
Merge branch 'master' of https://github.com/phinze/homebrew-cask

* 'master' of https://github.com/phinze/homebrew-cask:
  Android Studio 0.4.2 build 133.970939
  moved league of legends to Casks dir
  node-webkit 0.8.4
  add milkytracker
  Prepend brew-cask dirs to $LOAD_PATH (not append)
Added :pkgutil uninstall option