port ms-markdown

[dcsan]

ref #23

ms markdown

not maintained
https://github.com/DerMambo/ms-markdown-editor
this relies on ace-embed, which hasn't been ported to 1.0 yet although there is a workaround.
I have a fork of reactive-ace, we could maybe use instead, but this is a complex package
and so ms-markdown would have to be changed too.
https://github.com/dcsan/meteor-reactive-ace.git

if we shift to use autoform, that will support custom templates in the future
yogiben/meteor-admin#11

todo:

• short-term: use workarounds to get ace-embed to work with 1.0 and upgrade both packages
• longterm - use different embedded markdown editor?

[dcsan]

separated from the forms package