Update TLS API and bug fixes

• TLS API is now based around buffers instead of files
• Existing TLS functions that took files have been suffixed with _from_path
• Fixed a bug in SSPI where payloads larger than 1300 bytes were not re-assembled correctly

Improved cmake windows path handling.

Attempt to fix the pathing compat with cmake. (#94)

 fix windows pathing compat with cmake.

Old Linux compatibilitiy fixes

GLIBC 2.5 fixes. (#88)

* GLIBC 2.5 fixes.

* Added some comments.

API updates, channel bootstrap is now new() only.

v0.2.0

Updated hash table usage to latest definitions. (#86)