Exclude newly created objects from optimistic check
Update documentation with `Saving objects in the database` section
Update documentation: add link to Query.without_distinct() in the `Automatic DISTINCT` section
Add description to setup.py in rst format
Remove unused import
Minor simplification
Minor change
Remove unused import
Remove unused import
Improved import
updated example
Merge branch 'master' to 'orm'
Update CHANGELOG.md
Update Pony ORM version: 0.6rc3 -> 0.6
Pony ORM Release 0.6