Added decorators to hide passwords for django error emails

[Rsgm]

I am always getting error emails on the signin page with sensitive information.

I know this does not fix the root of my problem, but I want to make sure that there is no future error emails with users' passwords in plain text.

[swistakm]

Sorry for waiting so long but there was obvious syntax error under Python 3.2 so I just waited for a fix. Can you show how email now looks with the change? How about providing settings variable for developers that still want passwords sent by email?

[swistakm]

Oh, sorry I just noticed that this is about error emails...

[Rsgm]

Thank you for adding this to the milestone. I was not aware of the 3.2 syntax change, which explains the failing test. I can fix this later tonight.

[swistakm]

No problem. I just have updated the v2.0.x branch and when it passes test I will prepare a new release.

[swistakm]

It seems that this is rather issue with our Travis build configuration (pip dropped support for Python 3.2 in 8.0.0) version. I will try to fix that in 2.0.0 sou you will need only to rebase your PR once it is done.

[Rsgm]

Sorry it took so long, I completely forgot about this. Anyway it's a tiny change and it's ready to merge.

[coveralls]

Coverage increased (+0.03%) to 95.595% when pulling 5597fb7 on Rsgm:master into c6ede5f on bread-and-pepper:master.

[coveralls]

Coverage increased (+0.01%) to 95.595% when pulling ee4185a on Rsgm:master into 7dfb3d5 on bread-and-pepper:master.