changed way to detect missing key since None is already a possible value
bugfix native json fields were not supported correcly
Merge pull request #145 from michele-comitini/postgresql_json_bug

bugfix native json fields were not supported correcly
Merge pull request #144 from michele-comitini/dal_sum_expression_fix

changed way to detect missing key since None is already a possible value
removed '[__+-+...+-+__]' from last commit
fixed issue 1600:Centralized migrations log, thanks Alan
fixed typo in changelog, thanks niphlod
fixed issue 1602:Retrieve migration data from db fails if table is not yet created
fixed issue 1599:Shell relative paths while webserver's are absolute in dal, thanks Alan
fixed issue 1596:Alias don't work with record versioning
improved json validator to output meaningful error
fixed issue 1602 again, thanks Alan
Merge pull request #146 from michele-comitini/native_json_local_check

improved json validator to output meaningful error
removed non-translatable json error
removed e, no None in IS_JSON
fixed possible _next vulnerability
better solution 1602, thanks Alan
better next validation, thanks Andre Kablu
appadmin_manage_without_https, thanks Anthony
fixed issue 1605:mongodb select fails with long limitby, thanks Alan