Fixed bugs:

• Issue #189: nested guard causes infinite loop
• Issue #190: non continuable condition should not return
• Issue #191: Cannot build on Cygwin
• (net server) didn't stop on a platform which merges IPv6 and IPv4 sockets, having the same port, into one
• Fixing build process on FreeBSD. (FindGC added -L option globally)
• Passing time-process and time-thread to current-time didn't return proper values

Improvements:

• Build process can find clock_gettime on Linux properly.
• <process> object now initialises all ports to #f.
• (sagittarius socket) defines and raises socket specific conditions.
• socket-accept can be interrupted by thread-interrupt!.

New features:

• WebSocket library (rfc websocket) has been added.
• get-process-times and get-thread-times have been added to retrieve CPU time of process and thread.

Incompatible changes:

• (core syntax-case) is renamed to (core macro).

Miscellaneous

• size of SgVM was reduced.