adding ability to disable permission cache
update user default language in session if necessary
Merge pull request #1262 from Remo/patch-46

update user default language in session if necessary
Merge branch 'master' of github.com:concrete5/concrete5
acquire area permissions bug fix
permissions work
permissions cache bug fix
get area handle and name through method which is easier to override
Merge branch 'master' of https://github.com/Remo/concrete5