Regularize usage of Utils.WithAsInstanceOfOpt
Regularize usage of EclipseUtils, IScalaPresentationCompiler.RichResponse
Merge pull request #101 from huitseeker/pre/UtilsAPI

Cleanups as a prelude to Utils API
Adopt to new Utils API

Depends on https://github.com/scala-ide/scala-ide/pull/815
adapt to new API based on toplevel objects w/ public & private members
Merge pull request #102 from huitseeker/issue/UtilsAPI

Adopt to new Utils API