0.9
 - Fix for very old versions of libcurl (RHEL 5)
 - Do not convert paths to UTF-8 (only URLs)
 - Improve error message for unknown options

0.8
 - Fix for curl() character reader to invert byte-order on big endian architectures.

0.7
 - Rename the C function 'fetch' to 'fetchdata' because of Solaris conflict.
 - Move warning about missing CA bundle on Windows to onAttach.

0.6
 - Validation of SSL certificates is now enabled by default if a bundle is available.
 - Major rewrite to support configurable and reusable handles
 - Added new_handle, handle_setopt, handle_setheaders, handle_setform, handle_reset, etc.
 - Added curl_fetch interfaces for httr
 - Add ie_proxy_settings to get system proxy configuration on windows

0.5
 - Check for CURLM_CALL_MULTI_PERFORM to support very old versions of libcurl

0.4
 - Fixed a memory bug that could cause R to crash
 - Add curl_escape, curl_unescape
 - Add curl_version and curl_options

0.3
 - Add curl_download function
 - More efficient use of realloc
 - Fix for older versions of libcurl (e.g. Snow Leopard)
 - Add support for user interrupts while downloading (ESC or CTRL+C)
 - Fixed bug that caused GC to corrupt connection object
 - Refactoring and cleanup

0.2
  - add support for recycling connections

0.1
  - initial release
