Fix parent version for all modules (4.1.0-SNAPSHOT)

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13669 add org.eclipse.m2e.wtp.jsf.feature, org.eclipse.m2e.wtp.jaxrs.feature, org.eclipse.m2e.wtp.jpa.feature to org.jboss.tools.community.central.feature
JBIDE-13408: factorized generate-repository-facade to parent
JBIDE-13469 - Add property to disable JBoss Central opening when JBT are starting
JBIDE-13670, JBIDE-13682, JBIDE-13712, JBIDE-13724 remove everything that depends on Atlassian feature
Cleaner fix for JBIDE-13599..

Based on snjeza's patch but witout hard dependency on dmr, with no
dependency on having properties set in pom (can run tests from the
IDE), more tests and fully functional ${foo,bar:default} syntax as use
in iin jboss.

Adds suport for ${foo}, ${foo,baz}, ${foo:default}, ${foo,baz:default}
for the site url in the discovery url mechanism.
switch from stable/juno to development/kepler as default site to use in Central (JBIDE-13767)
JBIDE-13628 -  Only one JBoss Central Configurator is selected for display
Update README.md

Correct the URL for the JBoss Tools JIRA
JBIDE-13766 - org.jboss.tools.maven.profiles.ui doesn't export all packages
JBIDE-13804 set README.md for deleted feature and migrated plugin; comment out of plugins/pom.xml, features/pom.xml and site/category.xml
JBIDE-10588 : gracefully handle missing portlet plugin

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13739 : allow CDI support to be disabled

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13804, JBDS-2490 Max has asked that the latest version of org.jboss.tools.central.discovery be put back into the jbosstools-central repo so it can then be migrated directly to a new github repo (JBDS-2490: jbosstools-discovery)
JBIDE-13881 : new backgrounds for the GWT, HTML5, Richfaces wizards

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13816 - Maven repository is not visible if its not active by default
JBIDE-13599 - externalize Central site URL
Adding documentation
JBIDE-13599 - externalize Central site URL

   Documentation added where is needed.
   DiscoveryConnector moved to JBossDiscoveryConnector to avoid confusion
and ClassCastExceptions.
   siteUrl resolution is now only in  JBossDiscoveryConnector.validate() method
   Ancestor of ExpressionResolutionException changed to RuntimeException and
tests for resolver changed to reflect this cahnge.
   DiscoveryTest reflection method are replaced with direct method calls
JBIDE-13599 - externalize Central site URL