Merge pull request #593 from luebbert42/devel

adapted example to structure similar to foxx-authentification app
updated documentation
properly set error code
issue #564: better automatic mimetype detection for assets

also added possibility to override automatic detection with hard-coded value from manifest
added not-used code for localost->127.0.0.1
fixed some minor issues in arangob
some upgrade nodes
Merge pull request #594 from luebbert42/devel

switched the order of FoxxManager & Foxx for didactic reasons
updated documentation
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
updated documentation
updated documentation
updated documentation, added tests
removed current-database API
updated CHANGELOG
updated documentation
updated documentation
removed unused define
issue #595
removed test output