Treats String properties as required if not nullable.

This results in a more consistent behavior since grails trims String-Inputs by default in current versions.

@see http://goo.gl/iylAvL
remove Eclipse configuration files from git
Merge branch 'stringTrimmerAdjustment' of https://github.com/delight/grails-scaffolding into delight-stringTrimmerAdjustment

Conflicts:
	src/templates/scaffolding/_form.gsp