Merge pull request #34 from gamerson/master

Make sure that base content types are always searched
Avoid ClassCastException
Merge pull request #35 from kuozhang/avoid-ClassCastException

Avoid ClassCastException
36: 1.0.0 release
https://github.com/angelozerr/eclipse-wtp-xml-search/issues/issue/36

<scm> tag is mandatory
36: 1.0.0 release
https://github.com/angelozerr/eclipse-wtp-xml-search/issues/issue/36

added scm:git:  to scm URLs
update license header
add license infos to features
add parent tag to make release 1.0.0 easier
[maven-release-plugin] prepare release eclipse-wtp-xml-search-1.0.0
[maven-release-plugin] prepare for next development iteration
switch to next dev version
Update README.md
Directly use IModelHandler API for finding content type fixes #38

Signed-off-by: Gregory Amerson <gregory.amerson@liferay.com>