pjax 1.9.3

• Fix fragment inclusion when fragment === 'body'
• Add support for file input fields for form submits
• Fix maxCacheLength setting and using it to disable caching
• Don't break the back button after having loaded a static HTML page
• Fix pjax on iOS Simulator
• Fix handling <script src> tags with no type attribute
• Have minifiers retain the copyright notice in source
• Indicate MIT license in source code
• Fix adding _pjax parameter when data option is explicitly supplied
• Simplify & improve detection of same-page anchors