Added ability to specify controlsTpl in a custom directive

[ttonyh]

I added the ability to specify a "controlsTpl" property, overriding any referenced theme, in a custom directive. I found this useful when creating a custom xeditable directive that uses a custom, composite directive, made up of Angular Material elements.

The controls wrapper "md-input-container" was being applied over an existing one. This override allows me to use a DIV or something else (other than what's specified in the theme) and avoid having nested "md-input-container".

[eugef]

Hi @ttonyh, thanks for you PR. To be able to merge it - could you also add documentation how to use it and unit test.

[ttonyh]

@eugef I'd be happy to. What's the documentation procedure for this project?

[eugef]

@ttonyh , just add information about new attribute to the docs/jade/reference.jade and also nice to add demo example as it is done for some other attributes.

[ttonyh]

@eugef Docs have been updated per your request, please review when you get the chance. Thanks :-)

[ckosloski]

You don't need the index.html, that gets generated on build. For the demo example, create a new folder in docs/demos called custom-template or what ever seems appropriate. Create a controller.js, desc.md, test.js, view.html (or copy them) and put in your example and tests. You will also need to update structure.js with your new example

[ttonyh]

@ckosloski Ok, will do. Thank you!

[ckosloski]

@ttonyh can you update your request?

[eugef]

@ttonyh please include only src/ files in your PR

[ckosloski]

@ttonyh Can you remove all the generated files from your request?

[ckosloski]

@ttonyh any update on this?