[bug 855671] Handle phony addon using FfA feedback

Firefox for Android users could be using the phony addon which changes
their user agent to something else. The problem being that our code
would throw an exception because various fields in the feedback
response table can't have nulls.

This changes how we parse user agent strings so that instead of None
we now use "Unknown".

This lets Firefox for Android phony users to enter in feedback and
we'll capture the phony user agent, keep the feedback and attribute
it to "Unknown".
Fix browser check
Cosmetic documentation tweak.
[bug 860754] Adding Malay (ms)
[bug 854022] feedback should have links for the data

Add links for datestamp, platform and locale.
Add CONTRIBUTORS file

I really thought we had one. Oops!
Nix unused files

We don't use these requirements files and the funfactory requirements
files they pull from are ridiculously out of date. So, best to nix
them.
Nix jenkins usage of requirements/dev.txt file

The file is horribly out of date. I'm not sure why Jenkins was using it.
Update playdoh-lib

This picks up:

9327312 Update funfactory
56ac66b Merge pull request #37 from dpoirier/update-django-multidb-router
1bdbc40 Update django-multidb-router to ignore .pycs
efa6125 Merge pull request #35 from gcapizzi/master
3fab887 Upgrade commonware to 0.4.2
578ce1c Merge pull request #34 from Pike/update-requests-1.1.0
f23dc06 update requests to 1.1.0
Update maintenance section, fix parse issue

* updates the "add a new locale" section to include examples and
  full instructions--this should be pretty solid not
* fix a parsing issue in the hacking howto
* break up the index TOC into two sections for better findability
Fix typo
pep-8 pass
[bug 862625] Add happy/sad redirects

This adds redirects for handling /happy and /sad which are urls that
are being used somewhere. As soon as those urls are fixed we can
remove these redirects. This is covered in bug #862844.
[bug 858511] Add permalink and view for responses
Add onboarding docs
Add some more onboarding steps
[bug 868403] Fix OverflowError in smart_int
Nix errant print statement
[bug 866827] Prevent site crawling
Fix services view to not be localized