Upgraded to Spring Mobile 1.1.0M1

Upgraded to Spring Mobile 1.1.0M1 and wurfl 1.3.1.1.
Also upgraded to grails 2.1.0

The new spring mobile added a function to detect tablets. We need this
for a proejct we are working on, so decided to add it.
Removed Wurfl for now.

Spring Mobile 1.1.0 seems to have dropped support for WURFL.
Bumped up one version.

This should prevent any conflicts between the version in the grails repo
and in our artifactory repo.
Packaged plugin.
Added SNAPSHOT to version name.

This is supposedly more maven 'compliant'.
Merge branch 'master' of https://github.com/Spantree/spring-mobile-grails-plugin into Spantree-master

Conflicts:
	.gitignore
	SpringMobileGrailsPlugin.groovy
	application.properties
	plugin.xml