pex 1.1.5

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1.1.5

• Fix PEXBuilder.clone and thus bdist_pex --pex-args for --python and --python-shebang: #234 fixed #233
• Fix old pkg_resources egg version normalization: #227 fixed #226
• Fix the inherit_path handling: #224
• Fix handling of bad distribution script names when used as the pex entrypoint: #221 fixed #220