Merge branch 'release/0.2.0' into develop
memCache: added new module
memCache: added support for keeping track of number hits (gets)
logging: fix error logs leaking from tests
memCache: teaked naming
virtDepFile: added as a factory
caching: Added in-memory caching for all requests

- What was dependenciesOf is now factored into getFileFor
- Added virtDepFile to unify getFileFor api

Dependencies post-refactor:

o uncachedDependenciesOf
|
| o dependenciesOf
| |
| o cachedGetFileFor
|/ \
|   o memCache
|
o getFileFor
Routes: Added /cache to peek into memCache's status
Cacing: Implemented, enabled for all requests

- All files are memory-cached
  - Even virtual ones created by virtDepFile (e.g. for github://)

--
Merge branch 'feature/add-caching' into develop
Readme: Added #non-local-protocols, #caching
package.json: version bump
Release/0.3.0: Added caching for http(s):// and github://

- And for local packages as well, but the speedup is much more
  noticable for remote files.
- Updated Readme.md to reflect recent additions.

--
Merge branch 'release/0.3.0'