Swapped pip submodule for version 1.3.X
Added symlink to new test_link.py pip test
Refactored RInstallCommand.__init__() to comply with new InstallCommand.__init__()
Removed return statement that will never be reached
Added assert_raises_regexp() from pip 1.3.X test_pip.py
Added test_ssl.py symlink
Refactored sb command patching to match the way pip 1.3.X imports modules
Added symlink to new test_locations.py pip test
Added empty skip[] parameter to fix --prefer-pinned-revision for pip, setuptools

pip and setuptools were not included in the InstallReqChecker().pre_installed list and thus --prefer-pinned-revision had no effect on them
Temporarily excluded test_uninstall_namespace_package until final upgrade to pip 1.3.x

The test currently fails because snakebasket chokes on installing the setuptools-0.7.4 sub-requirement of pd.requirements
Resolved merge conflict (removed unnecessary comment)
Merge pull request #10 from prezi/sbnewpip

Updated to work with pip 1.3.X