Code optimizations

[deepbrook]

I have removed the str() conversion of the URLBuilder class, since those are already strings (I will have to see what python2.7 has to say about this, but it should hold true there as well).

Also, I renamed RantsResponse to MultiRantsResponse, since this caused me quite some confusion, since the original name is quite close to RantResponse. Therefore, I prefixed it with Multi for better clarification and readability.

Let me know what you think!

[coveralls]

Coverage remained the same at 100.0% when pulling 9a80efa on nlsdfnbch:code-optimizations into c7b425f on aayush26:master.

[aayush26]

Your last PR is pushed to mainline and resulted in merge conflict. Take your time to resolve it.

[coveralls]

Coverage remained the same at 100.0% when pulling 23b1287 on nlsdfnbch:code-optimizations into 9ec91cc on aayush26:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 23b1287 on nlsdfnbch:code-optimizations into 9ec91cc on aayush26:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 23b1287 on nlsdfnbch:code-optimizations into 9ec91cc on aayush26:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 34490f5 on nlsdfnbch:code-optimizations into 9ec91cc on aayush26:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 34490f5 on nlsdfnbch:code-optimizations into 9ec91cc on aayush26:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 34490f5 on nlsdfnbch:code-optimizations into 9ec91cc on aayush26:master.