Fixed bugs:

• Issue #193: define-generic and define-method creates global bindings in scope
• Issue #194: Toplevel validation doesn't work properly
• Issue #195: Running with -r7 option doesn't disable keyword reading
• Issue #196: absolute-path procedure on POSIX environment doesn't return path if given file doesn't exist.
• Issue #197: regex-find ignores start position of matcher
• Applied SRFI-113 fixes.

Improvements:

• TLS library should be more stable
• Binding variable names are checked strictly.
• C runtime file on POSIX has version.

New features:

• Experimental C translator sagittarius-scheme2c is available (default off)
• library->path* procedure has been added.
• define-inliner accepts :origin keyword to evaluate the expression in the specified library.
• open-bytevector-input/output-port has been added to (binary io).
• ->binary-pre-allocated-buffer-input/output-port procedure has been added to (util buffer).
• SRFI-135 has been supported.
• Logging library (util logging) has been added.

Backward incompatible changes:

• er-rename is moved to (core macro) library.
• Default unbound-variable method raises an error.
• Mid level API of (rfc sftp) is changed.