Adding support for merge targets to be of a variable name.
Exposing the AbstractBuild to the BuildChooserContext to enable BuildChooser extensions to use build attributes (parameters, history, etc..) to make build selection decisions.
Merge pull request #146 from thomasbiddle/merge_target_accepts_variables

Adding support for merge targets to be of a variable name.
Merge pull request #149 from kphonik/chooser-context

Exposing the AbstractBuild to the BuildChooserContext