Fixed outdated example, Unit testing controllers, testing duplicate form submission
GRAILS-6901 - document data binding string trimming
document autoGrowCollectionLimit
Documentation on XSS prevention in 2.3 and updated "What's new" guide
Remove references to install-plugin which is now deprecated
remove more references to install-plugin
Merge branch '2.2.x'

Conflicts:
	src/en/guide/plugins/creatingAndInstallingPlugins.gdoc
fix markup
Describe new blank string data binding behavior
documentation updates, include upgrade notes for users upgrading from 2.2
GRAILS-6512: Specify the main difference between integration and functional testing phases
Merge pull request #136 from mieky/GRAILS-6512

GRAILS-6512: Specify the difference between integration and functional testing phases
GRAILS-2871 - data binding docs

Updates to the data binding docs, much of which relates specifically to binding to collections.
Merge pull request #134 from greggigon/master

Fixed example for Unite testing controllers, Duplicate form submission
docs for RESTful URL mappings
GRAILS-10092 - add some docs for namespaced controllers
GRAILS-9773 Update documentation for new datasource config option
GRAILS-9773 Update documentation for new datasource config option, other languages
fix typo
minor cleanup