Please cherry-pick (Massive rewrite):

Please cherry-pick (Massive rewrite):

Only jcontacts-business-core:
- added administrative session-scoped bean (aka. "controller") for business
  data
- added initial JSF view and template for above bean, added also first form
  fields
- added option to enable (default) or disable business contacts in admin
  menu

In general:
- removed h:outputText where it was not needed as the parent JSF tag can
  do it, too
- still I'm a bit undecided about where the attribute styleClass is used
- fixed i18n key, was a copy-paste mistake
- added missing for-attribute
- phoneId was long time ago valid, now that there are 2 numbers,
  land-line and fax, the ids should be named accordingly
- added validator for email address validation
- removed id-attribute where it was not really needed or might cause
  harm to the rendering engine (?)
- h:message should be always outside, h:panelGroup, not really required
  by JSF but by design (consistency)
- added validatorMessage-attribute for email address fields
- added context parameter (thanks to BalusC for the idea) for making all
  empty strings being interpreted as null
- added missing i18n strings

Performance rewrites:
- rewrote converters and validators, they seem to be re-instanciated after
  each use, so the set EJB instances must be static to be loaded and set
  on-demand
- still this may ask for a lot room for improvement as the EJB is still called
  each time the converter/validator is being used
- also the Pattern instance for email validator should be "static cached"
  because it will use a lot CPU cycles and will then slow-down the application

Signed-off-by: Roland Häder <roland@mxchange.org>