Coding style
Tests for unicodes
Tests for unicodes
Fixed unicode problem
Version 0.20.4
Big refactoring
 * Removed some unnecessary exceptions
 * Complete refactoring of base classes (Query, Feature/s)
 * No more dynamic doc messages
 * Everything in unicode
 * Type validation at properties, not somewhere in upper classes
 * And a lot of more
Merge origin/master into v1
Fixed setup.py
Values enclosed by single quotes
Possibility to specify offset without limit
Select for update
Allow turn off some select options (distinct, cache, ...)
Refactoring of select options
Fixed unicode problem
Refactoring of args parser