Merge pull request #18 from Julian/master

Don't allow additional kwargs to attributes.
Use parametrize instead of for loops in tests
Add store_attributes
Add tests for Attribute.__eq__
Polish changelog entry
Add attribute storage to examples
Merge branch 'pr/20'

Fixes #20, #19
Fix module docstring
Rebase against master once more
Remove stale comment

Side-stepping doesn't work anymore since we don't use setattr anymore.
Speed up common case of no default values
Minor docstring fixes
Merge pull request #9 from hynek/speedup

Speedup with_init

Code generation is now used to create the actual initializer.

This is is much faster already and opens up opportunities for even more optimizations in the future.
Prepare 14.2
Start 14.3.0 cycle
Truncate long attribute values by using reprlib.repr.