make enum34 installation conditional on python < 3.4
make enum34 installation conditional on python < 3.4

skeuomorf/cryptography,bwhmather/cryptography,Hasimir/cryptography,Ayrx/cryptography,Hasimir/cryptography,skeuomorf/cryptography,sholsapp/cryptography,Ayrx/cryptography,kimvais/cryptography,Ayrx/cryptography,skeuomorf/cryptography,bwhmather/cryptography,sholsapp/cryptography,kimvais/cryptography,Hasimir/cryptography,Hasimir/cryptography,Ayrx/cryptography,kimvais/cryptography,skeuomorf/cryptography,sholsapp/cryptography,kimvais/cryptography,bwhmather/cryptography,bwhmather/cryptography,sholsapp/cryptography