Initial support for yarn workspace.

Support lerna workspace, fix for when to use template files.

Remove support for specifying srcPaths in package.json.

Re-enable transpilation caching.

…instead of matching function.

Note: monorepos won't work after eject.
Can be fixed easily with JEST 22.0.?+ which has file pattern matches against realpaths.

… app.

(Not sure this is desireable, might be cool to be able to easily run all tests in monorepo from one app.)

…nly tests that are dependencies of app.

(tests can be easily filtered via jest cli if desired, e.g. 'npm test -- myapp comp1')

…ash.

…repo root.

Fixes build/start after eject.

* Simply monorepo pkg finder
* Only include monorepo pkgs if app itself is included in monorepo
* Check for specific tests in e2e

* remove support for lerna w/o yarn workspace
* add react and react-dom as devDeps to comp1 and comp2