issue #1003: added feature to use backslash escaping for CSV data in arangoimp
updated documentation
issue #1007: fixed broken markup
further documentation fixes, provided by @CoDEmanX
Merge branch 'devel' of https://github.com/CoDEmanX/ArangoDB into CoDEmanX-devel

Conflicts:
	Documentation/Books/Users/Aql/Advanced.mdpp
	Documentation/Books/Users/Aql/Functions.mdpp
	Documentation/Books/Users/Aql/GraphOperations.mdpp
	Documentation/Books/Users/AqlExamples/Grouping.mdpp
Merge branch 'CoDEmanX-devel' into devel
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