Checking if valid email before sending notification
Bug fix for groups iterator
Optimizing method
Merge branch 'master' of github.com:idega/com.idega.core

* 'master' of github.com:idega/com.idega.core:
  Bug fix for groups iterator
  Checking if valid email before sending notification
Checking if provided value is not empty
Added possibility to load file from repository
Merge branch 'master' of github.com:idega/com.idega.core into BRANCH_PLATFORM_5

Conflicts:
	src/java/com/idega/core/accesscontrol/business/AccessControl.java
	src/java/com/idega/util/CoreUtil.java
Checking if not empty
Fixes for appendJoinOn method to accept
multiple sub-types of of some provided type
Removed needless message
Merge branch 'master' of github.com:idega/com.idega.core
Checking if file exists in repository
Merge branch 'master' of github.com:idega/com.idega.core into BRANCH_PLATFORM_5
New method to remember user's active role
New method for selecting disting results
Merge branch 'master' of github.com:idega/com.idega.core

* 'master' of github.com:idega/com.idega.core:
  New method to remember user's active role
Changed version of hsqldb
Avoiding array out of index error
Extending update method for Address
Improving browser version detection