Adding grails content
Merge pull request #2 from allisonf/grails-content

Adding grails content
Adding links to slides and code for TDD/Spock section
Merge pull request #3 from craigatk/tdd-spock

Adding links to slides and code for TDD/Spock section
add groovy intro, data types to scripting session
Merge pull request #4 from gr8workshops/GroovyScripting

add groovy intro, data types to scripting session
add exercises and more slides to scripting session also added folder for intro to grails
Merge pull request #5 from gr8workshops/ScriptingUpdates

add exercises and more slides to scripting session also added folder for...
Merge remote-tracking branch 'upstream/master'
adding code and slide links for functional groovy