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