Updated session functions, some channel functions for specific exception handling.

Added exception handling failure tests for session functions, channel pty.
Updated changelog.

Author: Pan

Changelog.rst

@@ -1,6 +1,17 @@
 Change Log
 =============
 
+0.12.0
+++++++++
+
+Changes
+---------
+
+* Session functions now raise exceptions.
+* Channel functions now raise specific exceptions.
+* Added exceptions for all known libssh2 error codes.
+* Added ``ssh2.utils.handle_error_codes`` function for raising appropriate exception from error code.
+
 0.11.0
 +++++++
 

doc/api.rst

@@ -14,3 +14,4 @@ API Documentation
    exceptions
    statinfo
    fileinfo
+   utils

doc/utils.rst

@@ -0,0 +1,7 @@
+Utility Functions
+===================
+
+.. automodule:: ssh2.utils
+   :members:
+   :undoc-members:
+   :member-order: groupwise