Added a few help files
Multi level multi select now implemented
Multiple multi-selects are now working
Removed warning that doesn't apply to muli-level selections
Removed annoying spacing
Remove another annoying space
Cleaned up more whitespace
Renamed button
Added remove button to remove prior selections
Merge branch 'master' of https://github.com/jenkinsci/extended-choice-parameter-plugin

Conflicts:
	src/main/resources/com/cwctravel/hudson/plugins/extended_choice_parameter/ExtendedChoiceParameterDefinition/config.jelly
	src/main/resources/com/cwctravel/hudson/plugins/extended_choice_parameter/ExtendedChoiceParameterDefinition/index.jelly
Added a remove button and removed the li entries
Updated to support removing selections and always allow adding another one
Merge branch 'master' of https://github.com/jenkinsci/extended-choice-parameter-plugin