Merge pull request #565 from herby/requirejs-wip

Pluggable Exporters included plus few fixes.
Merge pull request #567 from herby/requirejs-wip

Transport type 'amd' is outputted fine from IDE as well as amberc
Merge pull request #570 from herby/requirejs-wip

updated amdefine; define catches unnamed module early
Merge pull request #571 from herby/requirejs-wip

updated amdefine; much simpler injecting now
grunt-amberc: remove now obsolete 'init' option
amberc: remove now obsolete 'init' option
amberc.js: add support for specifying amd_namespace
amberc: add commandline option for specfying the amd_namespace
grunt: add amd_namespace option
grunt-amber: change MyPackage to MyNamespace
Merge pull request #573 from mkroehnert/requirejs

[requirejs] amberc and grunt-amber now offer an option to set the amd_namespace