add optional increment_by argument to seq
add documentation for `increment_by` kwarg for `seq`
add doc to demonstrate locally defined recipes
start seq count at increment_by value
clarify reasons for using local recipes
Merge branch 'master' of github.com:vandersonmota/model_mommy into local_recipe_doc
Merge pull request #107 from jsatt/local_recipe_doc

add doc to demonstrate locally defined recipes
Merge pull request #106 from jsatt/seq_increment_by

Seq increment_by
first draft
fix empty recipes queryset lookup
extending tests to prepare method
unicode strings should be used

In Django the database drivers automatically transform bytes to str. If we generate bytes then models behave differently than if we get them from the database.
fix tests to support unicode fields
Install requirements as part of travis config
updating tox.ini with dependencies
using pillow instead of PIL for testing
testing allow_errors
invalid yaml
using absolute import
fix import problem