Reduce ApiKey key length to 128 (closes #757)

This avoids issues with MySQL where multi-byte encodings will cause a
256-character field to exceed the maximum index length (767 bytes).

https://github.com/toastdriven/django-tastypie/issues/757
Merge pull request #757 from acdha/757-shrink-apikey-db-field-length

Reduce ApiKey.key length to avoid MySQL's famous error: 'Failed to install index for tastypie.ApiKey model: Specified key was too long; max key length is 767 bytes'
Fixed a bug where ``tastypie.utils.timezone.now`` could toss an exception. Thanks to tunix for the original patch!
Travis, you are fragile & sometimes I don't like you very much.
adds some notes on how to deal with throttling for a resourse
adds missing `:`
adds double `` for markdown
#273: Changes from llonchj; Added tests to cover dots in pks in urls.
Merge pull request #1013 from toastdriven/alphanumeric-pk-urls

Changes from llonchj; Added tests to cover dots in pks in urls.
Merge pull request #1008 from alecklandgraf/feature/adds-to-throttling-doc

Feature/adds to throttling doc
Fixed #486 - Added documentation for disabling all methods on list and detail endpoints

Signed-off-by: Pankaj Singh <psjinx@gmail.com>
Merge pull request #1025 from psjinx/issue#486

Fixed #486
fix missing python-mimeparse dependency in setup.py
Merge pull request #1029 from yedpodtrzitko/master

fix missing python-mimeparse dependency in setup.py
Update content_types.rst

It isn't fully clear from reading this documentation that you must register your ModelResources to your Api instance in URLconf.  This update should make it more clear and help those that are receiving a '' for generic related objects from any API calls.
Merge pull request #1030 from cherepski/patch-1

Update content_types.rst
Update tools.rst
Merge pull request #1041 from thinkingpotato/patch-1

Update tools.rst
assertHttpAccepted produces better error message
Merge pull request #1047 from damoti/master

assertHttpAccepted produces better error message