Update framework blog post with a few details
Wrap params in quotes

This will handle spaces in file paths
Merge branch 'master' of github.com:csexton/ios-framework-builder

* 'master' of github.com:csexton/ios-framework-builder:
  - Clean the framework target dir (i.e., delete) before building the framework. - Allow customization of several params through env variables that can be set in the post build script (rather than using the project name). The static header dir, e.g., does not match the default set in the script when creating a fresh library in Xcode 5.1. So, allow overriding it (e.g., to /usr/local/include which appears to be the default).