Merge pull request #2 from jbaruch/master

Merging of plugins and dsl support
Merge https://github.com/jbaruch/artifactory-user-plugins
Merge https://github.com/jbaruch/artifactory-user-plugins
Merge https://github.com/jbaruch/artifactory-user-plugins
Removed non-existing allBuilds param
Merge https://github.com/jbaruch/artifactory-user-plugins
Merge remote-tracking branch 'origin/master'
FrogDev/artifactory-user-plugins

Conflicts:
	build/staging.groovy

Conflicts:
	build/staging.groovy
Fix Released status string
fallback regex fixed
documentation added
documentation added
Update build/promotion.groovy
documentation added
use more apt module name
download section done
refactoring to methods with closures, closures attributes to documentation :(
completed as much as possible. Drawbacks:
* no support for optional method arguments
* no support for custom named closures (e.g. realms, jobs, executions, staging, promotions, etc.)
executions fixed, short description added
Simple plugin, which deletes items marked with analysis.deprecated=true property.
deleting empty directorties added