chore(travis): ensure building dir is 'generator-angular'

Author: Gonzalo Ruiz de Villa

Diff for: .travis.yml

@@ -2,3 +2,7 @@ language: node_js
 node_js:
   - '0.10'
   - '0.8'
+before_install:
+  - currentfolder=${PWD##*/}
+  - if [ "$currentfolder" != 'generator-angular' ]; then cd .. && eval "mv $currentfolder generator-angular" && cd generator-angular; fi
+