Support alternative CinderBlock locations about tinderbox-mac

[sansumbrella]

My main preference would be for blocks to be found adjacent to a Cinder installation. This makes it simple to manage the blocks and Cinder as submodules of a project repository. Also, it keeps the search space for blocks limited and makes setting the CINDER_PATH for the block straightforward.

e.g.

-MyAwesomeProject
  -apps
    -MainApplication
    -SpecialFeatureTest
    -AssetPrepTool
  -lib (each is a submodule of the MyAwesomeProject repository)
    -Cinder
    -Cinder-ImGui
    -Choreograph
    -EntityX

[sansumbrella]

I would be happy to make a PR for this feature if the TinderBox source is available to fork somewhere.

[sansumbrella]

Alternatively, if someone has figured out a magic trick for making git play nice with nested repositories, that would be pretty rad.

[sansumbrella]

A possible solution:

Support symlinks/aliases inside Cinder's blocks directory, and expand them to the canonical path when actually creating the project. This way, Tinderbox doesn't need to search any additional paths, no UI elements need to be introduced, users can place the true block wherever they like, and projects created via symlink will still work if the symlink is removed.

At present, TinderBox ignores aliases in the blocks directory. It would be great if it followed those links to their actual disk location.

[sansumbrella]

Moving issue to TinderBox source repo. cinder/TinderBox#1