Added some missing functions
new graphs
review and graph base
Manage graphs
example
AMB edges and vertex in graph
Merge branch 'f-aqlbuilder' into dev

* f-aqlbuilder:
  Custom aql structures
Added traversal
fix function name . traverse
basic doc database
messages in error
need to finish aql
need to finish model
change in aql
some names changed in aql builder
Merge branch 'dev' of github.com:diegogub/aranGO into dev

* 'dev' of github.com:diegogub/aranGO:
  need to finish model

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Merge branch 'master' into dev

* master:
  some names changed in aql builder

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no error msg in json
unique contraint
added unique recursive into anonymous structs