Fixed statistics for FreeBSD

By default it would try to compile the windows code, since the TRI_HAVE_MACOS_MEM_STATS doesn't cover BSD's.
enable more indexes
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
Merge pull request #1125 from threez/patch-2

Fixed statistics for FreeBSD
added tests
issue #1126: cleaned up compilation manual
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
issue #1126
Update to FoxxGenerator 0.5.1
Be a bit more specific about howto run tests, and where to get more help.
jslint
Slightly more detailed explanation of 'foxx-manager fetch github'
Fix a bug in list access for AqlValues.
Choose more sensible block sizes for fetch from dependency.
Only put non-toplevel vars into the INTO variable in a COLLECT.

This restores the behaviour of 2.2.
Improve documentation of COLLECT AQL statement.
Fix a buffer overflow that did not have any effect.
Fix a comment.
added mergeArrays attribute
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel