Feature angular ui

[fritzo]

DO NOT MERGE - for discussion only

[yangit]

I removed assert.js altogether. We'll be using nodejs/assert instead.
DOC is now in a broken state as I basically threw away most of the code and will be refactoring it back into angular controllers.
There is clientSrc-old/ folder and it will be there until I finish refactoring.
I do not want to merge into master now as angular-ui branch is in uncompleted state. It is basically only a scaffolding without any functionality. As I move most of editor functionality to this branch I will merge it to master.

[yangit]

Every file is going to have strict mode on.
jshint will not pass otherwise.

[fritzo]

The corpus should be loaded from the text file corpus.dump instead of embedded in-line. The corpus.dump file should be git-controlled source code (not json). We can eventually factor this out as a pomagma-corpus repo, but I am in no hurry.

[fritzo]

(FYI The corpus file format has been stable for over a year, since before the original python-sqlite-git bridge https://github.com/fritzo/pomagma/blob/5aa8ee82ef6b0133cd5ed026d0db3b41167c2e02/src/corpus.py )