add first files for account management
add cryptographic operations and tests about these operations and the master key
add file account_controller
beginning of the master key generation - Pbs in initializeMasterKey : db.view, db.merge
Generate and delete master key
Merge pull request #4 from jsilvestre/master

Added: the IRC information section
post /account/ and get /account/:id
add librairy user
add some tests
code cleaning
code cleaning
code cleaning
add tests about merge, update and delete an account
add updateAccount
add merge an account and delete an account
code cleaning
test existence
existence of an account
add upsert an account and update keys
code cleaning