Fixed small error in bot.py
Fixed wrong link
updated documentation
issue #1005: updated documentation
removed mathjax from gitbook
fixed WAL recovery which hung in certain conditions
Added text to documentation
Fix and unify asterisks, tested with GitBook.

Italic asterisks should be done by escaping the asterisk and wrapping it with html i-tag. It seems to be the only safe technique (3 asterisks to display 1 italic asterisk in a list works, unless followed by more markup for italic text; 1 escaped asterisk wrapped by i-tag works regardless of the rest of the line).
Merge pull request #1012 from CoDEmanX/devel

Fix and unify asterisks, tested with GitBook.
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into aql2