Attach a slash to dir-names in the endpoint of readDir
bugfix: use full path name everywhere
make the directory listings confirming to the updated io requirements
add a lightweight event-emitter module
Add new InMemory io implementation

This module is intended to eventually end up in a stand-alone
io javascript module that is made from ufoJS/tools/io and some
metapolator io libraries.
add io/readDirRecursive helper function
remove old 'master' angular module, rename 'filesMode' into 'textEditor'
integrate the textEditor module
include codemiror in the demo build

add io as a angular constant/service

outline switch between demo and normall mode
handle ES/6 dependencies when building the demo
Merge pull request #313 from graphicore/return-codemirror

Return codemirror