remove from git tracking build and dist directories and all files under

remove from git tracking build and dist directories and all files under
start branch develop
exclude generated documentation from tracked files
transform documentation from epydoc syntax to sphynx syntax
Merge branch 'develop' into feature_mongokit_ee_integration

transform documentaion form epydoc to sphynx
add graphviz extention in sphinx
add graph of states/transition  between status
remove mock database replace by real mongokit code
change string representation of status