Merge pull request #234 from emorency/master

OPAL-1915: Moving User, Group and Status from org.obiba.opal.core to org...
Small fix for navigation problems in Projects and Administration section
Merge pull request #235 from kazoompa/feature-bootstrapification

Small fix for navigation problems in Projects and Administration section
Project title is in the breadcrumb
Administration page sections updated
Variable and table toolbar updated.
Allow to update a user without entering a password