match new description wording from io page

- added small 'new user guide' at top
- reworked 'downloads' part
- changed layout of 'translation' part
- removed server list in favor of gh pages link (server list can be found there)
- switched to https everywhere (zlib not supported yet --> added hint)

badge for master branch

Portable info

- toc changed (removed DocToc)
- relinks to the toc on top under every category
- image included on top
- added other servers in community ressources

using doctoc

TOC entries with images need to be manually repaired,
https://github.com/thlorenz/doctoc/issues/73

Compile & install servatrice

Unhandled currently:
servatrice.ini modification
mysql setup/config/connection

- add link to translation faq in the wiki
- force more space between the images
- updated the picture links

Did you change any names from "oracle_ents" to "oracle" within transifex @ctrlaltca?

- add separate links to different translation files (cockatrice_en.ts & oracle_en.ts) if you click one of the statistics
- added transifex icon with link to cockatrice project
- text changes

Imported unzip methods from OSDaB-Zip project;
Adds a soft dependency on zlib to oracle; if lib if not found, oracle
will continue to compile and work but without zip support.

- moved "Community Resources" up as talked about here 7e92b4e7
- moved Gitter and Travis buttons for cleaner and nicer look

test description

ref #452