* 'devel' of https://github.com/arangodb/arangodb: (105 commits)
fixes ported from 2.8
fix version strings
lock debugging
Add missing return code if uniq constraints are violated.
added --enable-boost-tests in case the boost libraries are not available
Migrate jasmine->mocha
reorganise Aql/Basics.md for improved information retrieval
fix some locks
catch exception
make example copyable
another fix for Visual Studio
fixes for Visual Studio
added VPack version number
unification of sub-thread naming
removed outdated upgrading function
fixed test in failure mode
namespace cleanup
more checks & asserts, C API cleanup
class has virtual methods, so add virtual dtor, too
shorten critical logging section
...