Windows, SOAP 1.1, HTTP continue header, duplicate headers

Thanks to all involved!

#141 Adds SOAPAction header for SOAP 1.1
#140 Uses correct header for SOAP 1.1
#139 Fixes paths on windows
#124 Parse duplicate headers
#127 Fixes before and after events
#128 HTTP continue header

Fixed Guzzle POST requests and CURLINFO_HEADER_SIZE support

Implementation of CURLINFO_HEADER_SIZE thanks to @aaa2000
Fixed POST requests for Guzzle 3, 4 and 5 thanks to @justincy

Support for read only file systems

#110 thanks to @dbu PHP-VCR now also works in CI environments using a read only file system.

Support folders in cassette name.

#107 Folders can now be used in cassette names to create folders on the fly, thanks to @dbu and @thormeier.

Use equality check for request matching instead of patterns.

Matching parts of a request like url, headers, etc is now done using an equality check. The pattern approach lead to too many matching failures and misunderstandings.

Allow function names that have keywords

#102 thanks to @morrislaptop

Events (new feature) and StreamWrapper/SoapClient fixes

Events #86 thanks to @aaa2000 and SOAP and StreamWrapper headers #92 thanks to @chregu.

Guzzle dependency removed, JSON storage fixes

#82, #83, #87, #88, , #91 thanks to @aaa2000 and @yateric.

Fixed curl headers, readme improvements and new "blackhole" storage

Fixed curl headers #79 , readme improvements #80, new "blackhole" storage #81

Improvements for JSON storage and binary requests.

#73, #74, #75, thanks to @MrRio.