[12425] Implement spells 68987 and 69012

They are used in the Ick & Krick encounter - Pit of Saron
[12426] We centralized our issue tracking on cmangos/issues

All existing issues have been migrated to this centralized repository. As
of now, we will deactivate the issue tracker on this repository and only use
the new central one.
Please note that Pull Requests are still on the repository containing the
code and you'll still post them there, as they are directly associated
with that code.

Thanks to @github for making this possible with
https://github.com/blog/1439-closing-issues-across-repositories

[ci skip]
rewrite network stack using Boost::Asio library.

You need Boost 1.5.3 in order to compile new sources.
Add boost to VS project includes and Cmake support
Add linking support boost libs
Some easy switches to boost way
Add boost::extension library in deps

It's planeed use for portable access to shared libraries
In fact only single low-level file used from it expected:
dep/include/boost-extension/boost/extension/impl/linked_library.hpp
Add dep/includes to framework.vcxproj

For lookup boost-extension
Use boost::extension library for shared libs access
Fixed warnings in boost-extension.