Fix for users who cannot install on Mac due to XCode 5.1

[jamarparris]

The Apple LLVM compiler in Xcode 5.1 treats unrecognized command-line options as errors. This issue has been seen when building both Python native extensions and Ruby Gems, where some invalid compiler options are currently specified.

Details here: http://kaspermunck.github.io/2014/03/fixing-clang-error/

Temporary fix is to pass this argument "ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future" along with the pip install python-bcrypt command.

[corydolphin]

@jamarparris can you please test this branch #5 for me? I added the flags suggested. I have Xcode5.1 installed and do not seem to have the same issue as you are experiencing.

[jamarparris]

The way that I was able to get my pip install to work was to run this ->

ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install python-bcrypt