Added sections to the composite documentation detailing the new way to pass data, specify a view, and attach assets to a parent template. Also fixed an FAQ and the code example (code/doc).
Added the file CONTRIBUTING.md that links to the wiki tutorial for contributing code.
Merge pull request #957 from zhouyaoji/docs_contributing

[doc: GH #529] Added the file CONTRIBUTING.md that links to the wiki tutorial for contr...
Added an example showing how to specify the binder to use with the template.
Fixed typos and explanation of passing data to parent template.
Copy edit.
Used a generic name for the binder.
Merge pull request #956 from zhouyaoji/docs_update_composite_mojit

[doc] Added sections to the composite documentation detailing the new way to p...