Method optimalization

- getExtSourceByName, getVoExtSources, getExtSource no longer call getExtSourceById.
getAllowed{Users,Members} ignores disabled users
Merge pull request #486 from Natrezim/extSourceSecond

Methods optimalization
findUsers can find users having uppercase e-mail

DB value of e-mail is now converted to lowercase before comparing it
with input from the user (also converted to lowercase)
Optimized getAllowedResources(sess,facility,user)

 - use single sql query instead of one query per each resource assigned
	 on facility
Merge pull request #487 from Natrezim/getAllowed

getAllowed{Users,Members} ignores disabled users
CORE: fixed authorization in addHosts()

- When calling addHosts(), call getFacilitiesByDestination() from Bl not Entry.
REGISTRAR: fixed authz in copyMails/Form

- Fixed authz conditions when copying mails and forms in registrar.
Merge pull request #489 from zlamalp/fix

CORE: fixed authorization in addHosts()
Merge pull request #490 from zlamalp/authz

REGISTRAR: fixed authz in copyMails/Form
GUI: support for setting preferred unix group name
Merge pull request #491 from zlamalp/prefGroup

GUI: support for setting preferred unix group name
GUI: refactored and optimized gwt modules

- Based on knowledge from WUI project, gwt now uses inheritance:

- standard "mvn clean install" builds devel version of gui without sourcesMaps
  => speed up compile
- "mvn clean install -Pproduction" builds production version of gui without sourcesMaps
  but fo all browsers. Now uses xsiframe linker.
- for local development pick "-dev" modules, they build also sources map, but support only
  two browsers.

- Moved .gwt.xml files to ensure visibility to gwt compiler.
Merge pull request #492 from zlamalp/guigwt

GUI: refactored and optimized gwt modules
U:D:login-namespace - allow login tomcat

Login 'tomcat' was forbidden because it can collide with unix system
user tomcat. Actually system user's name is tomcat6 or tomcat7.

Conclusion:
login tomcat is allowed
logins tomcat[678] are forbidden