move some shared logic to functions
indent the proper amount
Add link about installation depdencies
don't do value checks in the numbers
Fixed typo
Fix other typo and use doc link instead
Merge pull request #1125 from reaperhulk/rsa-numbers-with-functions

Move some shared logic to functions
backend specific RSA*Key implementation for OpenSSL
remove skip in serialization tests until we have a backend that needs it
get numbers from loaded keys in numbers test
modify rsa.RSAPrivateKey to build old style key from numbers
remove an unused method
rsa_cdata creation should immediately be registered for gc
simplify test_rsa changes
pkey_size should be private
inline a single use function
do value checks when converting from numbers to key
Merge pull request #1126 from nryoung/doc-improvements

Add link about installation dependencies
refactor rsa encrypt/decrypt for simplicity
Fixed a reST syntax issue in the docs