Move site to new engine

* Move our site from our own Jinja2+Markdown to Pelican
* Move all pages from Markdown to RST(-highlightJS,+Pygmentize)
* Create plugin for documentation building (HTML for DocBook based and RST for hand-written texts)
  - Supports HTML for DocBook-generated documentation
  - Supports RST for HandWrittend Texts
  - Embedding into Pre-Based Templates
  - Using BeautifulSoup library for generating proper titles
* Adding Header to all site pages (e.g. Documentation)
* Modifications of CSS (we need to bring order to our CSS's)
* Modifications for DocBook xslt files and generations
* Add GitHub Ribbon
* Move FAQ to Documentation
* Documentation page is static now
* rocks.tarantool.org now in header
Fix rpm spec/init.d script.

Don't try to execute a Lua script.
Merge remote-tracking branch 'origin/new-new-site'
Give a better error message.
Merge branch 'ocelot-master'
Fix bug with cmake and symlink, and, also, fix init.script debian bug
remove reference to box-protocol.txt
Another iteration fo deleting box-protocol.txt
Don't try to create a log dir if it's a pipe to cronolog.
Fix all links to box-protocol.txt
Fix net_sql.*.test.lua
A fix and a test case for gh-500

A superuser can not manage grants on not owned objects
Merge branch 'master' of github.com:tarantool/tarantool