Update demos (description below).* Upgrade several demos to EmbeddedWildFlyLauncher (SDM was broken in some demos with the JBossLauncher).* Fix bugs in jpa demos relating to new IoC.* Remove non-Wildfly app server profiles for several demos (don't have resources to maintain them).* Rename jboss7 profiles to wildfly.* Update README.md files to refer to Wildfly instead of JBoss AS 6/7.* Add .gitignore.