First try to replace all application and apps with project

Still TODO:
Replace application/apps in translations and there refs!
Review application and app in test python files!
Merge branch 'master' into issue-531-rename-apps-v2
Merge branch 'master' into issue-531-rename-apps-v2
rename 'Create an app'
rename somre more applications
point to new pybossa js
replace app with project in strings for translation
merge master and fix merge conflicts
point to new pybossa.js
Merge branch 'issue-531-rename-apps-v2' of https://github.com/PyBossa/pybossa-default-theme into issue-531-rename-apps-v2
rename application to project
missed a renaming
Merge pull request #33 from PyBossa/issue-531-rename-apps-v2

Fixes #531
point to master pybossa js
Merge branch 'master' into various-fixes

* master:
  point to master pybossa js
  missed a renaming
  rename application to project
  point to new pybossa.js
  replace app with project in strings for translation
  point to new pybossa js
  rename somre more applications
  rename 'Create an app'
  First try to replace all application and apps with project