TOOLSDOC-390: Ready docs for 7.1
JBIDE-15656: package-info.java in managed package in persistence.xml causes StackOverflowError
remove .project, .classpath files and .settings folders from repository
ignore .project and .classpath files and .settings folders
bump version identifiers to 3.8.0
change runtime environment to java 6 where needed, don't include .classpath or .project files in build.properties
remove unexisting artefacts from build.properties
remove 'Eclipse-BundleShape: jar' to get rid of warnings
remove warnings from build.properties
delete empty plugin.xml
remove warning because of missing plugin.xml
remove dead code warning
remove maven related warnings
Revert "remove warnings from build.properties"

This reverts commit 7e285f5a724159cd6de38cdd9aef24abb5344ddc.
remove plugin.xml from build.properties
fix maven import of org.jboss.tools.hibernate.jpt.core.test
Revert "remove dead code warning"

This reverts commit 66398574cc3032a3f02745b857e49ad84f241f8f.
JBIDE-10219 Migrate org.eclipse.core.runtime.contentTypes extension points to org.eclipse.core.contenttype.contentTypes
remove unnecessary .settings/ folders
remove .cvsignore files