Cache number of children for profile field
Merge pull request #46 from fiedl/jb/631_cache_profile_field_children_count

Cache number of children for profile field
cached corporations instead of cached corporate vita
Merge pull request #47 from fiedl/jb/631_cache_corporate_vita_in_model

cached corporations instead of cached corporate vita
timeout error: adding timeout label instead of displaying nothing on the error page.
bug fix: local admins can edit profile fields of their users.

There has been a bug that allowed only global admins to modify or delete
profile fields of the users they are responsible for. This commit fixes
this behaviour. Local admins now can manage the profile fields of the
users they are responsible for.

uservoice tickets:
* no. 9: http://email.uservoice.com/c/ZD1kNTImaT01MzhmOTA5NDgzMmFjXzM5MDYzZjkxNmZlZGQzMWMyNDMzJTQwdXNlcnZvaWNlLmNvbSZoPTBmNDA5ZTNiZWQ5NjdmMDMxZWY0NjQxNTA2ZWM4NWU4Jmw9aHR0cCUzQSUyRiUyRndpbmdvbGYudXNlcnZvaWNlLmNvbSUyRmFkbWluJTJGdGlja2V0cyUyRjklM0ZlbWFpbF9sb2dpbl90b2tlbiUzRGExZWI3ZGVjMDdhY2RlMzZiZTM1NTA4YWRlN2E3YzYxJTI2dHJhY2tpbmdfY29kZSUzRDViNjllNjU3Zjk5YjhkMGYzYzdhNGYxYzY0NDNhNjRjJnRyYWNraW5nX2NvZGU9NWI2OWU2NTdmOTliOGQwZjNjN2E0ZjFjNjQ0M2E2NGMmcj1yZWljaGFyZHQuam9lcmclNDBnbWFpbC5jb20
* no. 10: http://email.uservoice.com/c/ZD1kNTImaT01Mzk2ZTZiMDExZWYxXzcxMmIzZmYwYTQxZTUzMTQ4MjU4YiU0MHVzZXJ2b2ljZS5jb20maD04NGVmYTc2MWZjYzFiZjY2NTFlZGRmM2FjYTNiZjU1MCZsPWh0dHAlM0ElMkYlMkZ3aW5nb2xmLnVzZXJ2b2ljZS5jb20lMkZhZG1pbiUyRnRpY2tldHMlMkYxMCUzRmVtYWlsX2xvZ2luX3Rva2VuJTNEYTFlYjdkZWMwN2FjZGUzNmJlMzU1MDhhZGU3YTdjNjElMjZ0cmFja2luZ19jb2RlJTNEZWRlOTMyYTZiZTc0ZDE5N2Y5ZmI4NmE0MmQ4NDQ0NWYmdHJhY2tpbmdfY29kZT1lZGU5MzJhNmJlNzRkMTk3ZjlmYjg2YTQyZDg0NDQ1ZiZyPXJlaWNoYXJkdC5qb2VyZyU0MGdtYWlsLmNvbQ
fixing caching issue for rails 3: undefined class/module.
adding basic activity logging using the public_activity gem.
wingolf layout: show vertical nav only when needed.

Otherwise, show the box with a width of 100%.
activities: adding jquery datatable functionality for activities#index.