[ADD] Add account_invoice_constraint_chronology
Merge branch '8.0' into 8.0-add-account_constraint_chronology
[IMP] Use new API on account_invoice_constraint_chronology for account.py
[IMP] account_inv/account_invoice_constraint_chronology doc spelling
[IMP] Exclude proforma2 state for draft invoice check on account_invoice_constraint_chronology
[IMP] DEFAULT_SERVER_DATE_FORMAT
Merge branch '8.0-add-account_constraint_chronology' of https://github.com/acsone/account-financial-tools into 8.0-add-account_constraint_chronology
[IMP] display formatted date with context timezone in exception popup for account_invoice_constraint_chronology addons
[ADD] Add context in  tests for account_invoice_constraint_chronology addons
[IMP] Use exceptions.warning for account_invoice_constraint_chronology addons
[IMP] Remove exclamation mark
[ADD] Add .pot file for account_invoice_constraint_chronology
[IMP] activate pep8 check in travis
[IMP] Better modularity and naming convention for account_journal_period_close
Merge pull request #25 from nbessi/activate_travis_pep

[IMP] activate pep8 check in travis
[IMP] Use CamelCase for account_journal_period_close
Merge pull request #26 from acsone/7.0-imp-account-journal-period-close-ape

[IMP] account_journal_period_close: Better modularity and naming convention
[IMP] Prevent to add both same journals on a period
[IMP] Use sql constraint to Prevent to add both same journals on a period
[IMP] Improve error message for account_journal_period_close