APE_JSF refactor

Here's a little something I planed while working on the new website. I find the current JSF hard to work with. Even I sometimes have hard time starting a new APE page without having to look at demos or the wiki on how to start. I also find stupid the default setup doesn't use the build client version. I made theses changes to make JSF more easy to start with. I bundle it as v.1.2 for clarity. I finnaly took example on Pablo's client structure (https://github.com/ptejada/ApePubSub)

### Here's what changed:
* Changed the **build** folder to **js/**
* Moved the **Source** folder inside **js/src/Core/Sources**
* Moved the uncompressed Core source to **js/src/Core/Combined**
* Kept the yui compresses sources as the main, renamed as _.min.js_ 
* The combined version of the Core files with Sessions support only contains the sessions code instead of all the core code. 
* Updated **Tools/Check**
* Updated **Demos**

Basically, one who want to deploy the JSF upload the "js" folder to his server (without _/src_) and he's good to go with those 4 files:
* apeClient.min.js
* apeConfig.js
* apeCore.min.js
* apeCoreSession.min.js

### Pros:
* Mark the seperation between Client/Core, Client/Mootools and Core/Mootools-core more clearly (The current default client is named Mootools.js. Someone who wan't to use JQuery on his page for example could delete the Mootools.js file...)
* The javascript client is now the default one. This means Mootools-core doesn't have to be included by default. JQuery is the most popular choice nowadays, I think it make more sense this way. The Mootools client is still there (in _/js/src/Client_), but one could use Mootools for UI and still use the Javascript client (See Chat Demos)
* Simplified the _sessions_ support.  Uncomment one line in the config, or add in the HTML (See the Chat demos) to enabled Sessions support. A config value would be ideal, but requires more work.

### Cons:
* Probably not compatible with Peter's pull request (https://github.com/APE-Project/APE_JSF/pull/16/files). Btw, I don't have access to this repo, I can't merge pull request. Instead of merging this pull request, I could also start over from Peter's one, no big deal.
* Documentation and wiki probably have to be updated too.



Let me know what you think. or if you have any suggestions !