* Support iisnode using named pipes as PORT value (Jonathan Sheely)

 * support 'mixinsources' option (Pradnya Baviskar)

 * compiler: Simplify verifyModelDefinitions() (Miroslav Bajtoš)

 * Fix coding style issues, add API docs (Miroslav Bajtoš)

 * Extend options arg to support custom model definitions (Shlomi Assaf)

 * add support for mixins  - [mixinDirs]: List of directories to look for files  containing model mixin definition. (Pradnya Baviskar)