OO-43: set quota for blog/podcast and CP editor (standard file upload and upload via the HTML editor)

- reorganized sass folder structure
- example theme (wip)

remove legacy wikiMarkup form + RadeoxLibrary

remove legacy Form.java, FormElement.java etc.  See jira issue for more information

lots of new icons and new styles

OO-23: fix issues with WebDAV + Versioning + some editors like Word, Excel, PowerPoint, BBEdit, Notepad and Pixelmator

adjust REST path to /system/log

OO-35: load only once the olat.properties and olat.local.properties and optimize the search of spring configuration

OO-23: fix an issue with the list of revisions of a file, always reload the revisions informations before showing the list of revisions, implements unit tests for the versions manager

NEW default theme for OpenOLAT
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- remove old "default"
- minor markup changes in velocity templates
- minor markup changes in JavaClasses (add css-classes to components)
- new iconset
- update yaml
- new theme:  "openolat"
- theme.readme
- ignore sass-cache

extension to the restAPI:  request logfiles

OO-11 Text cleanup, replaced OLAT with OpenOLAT on more places, changed about page in DMZ, fixed egg.js and removed all original OLAT icons