Merge pull request #145 from chuckdumont/nio

Factor out ResolverResource functionality into its own class
Merge pull request #147 from chuckdumont/nio

Improve bootstrap layer support.
Fixing JavaDoc in CSSModuleBuilder.
Merge pull request #151 from KenPowers/css-javadoc-fixes

Fixing JavaDoc in CSSModuleBuilder.
Enable Eclipse javadoc validation in project specific settings and fix
resulting warnings in the code