The query SET SQL_BIG_SELECTS=1 isn't supported by postgreSQL #101
Documents and Calendar

Implement Calendar
Document Improvement
Merge remote-tracking branch 'upstream/staging' into staging
Merge pull request #106 from xillibit/patch-8

Fix wrong definition of id in all tables for postgreSQL
Merge pull request #105 from juliopontes/staging

Calendar & Documents
Merge pull request #103 from xillibit/patch-9

The query SET SQL_BIG_SELECTS=1 isn't supported by postgreSQL #101
Published column isn't set to 1 by default with PostgreSQL tables