Windows and OS X not yet tested.
Moved toolchains .inc files to include/ folder.
Renamed folder lib/bin into _bin.
Moved bcrypt and twofish library into lib folder and into new cmake projects. Restored twofish library to the original version.
Fixed some format warnings.
This will allow setting per-project (build) settings and to build/link
Sphere using system-provided library source/headers/precompiled lib
(like the ones provided with -devel packages on Linux) instead of the
ones shipped with the projects.
This is also a necessary step to use git submodules.
Refactored 3rd party libraries folders, moving both source and binaries to /lib/.
Refactored CMakeLists.txt
Abandoned old MySQL C Connector in favor of MariaDB C Connector, which supports all MariaDB versions and MySQL 5.x and 8.x.
Windows: abandoned MySQL libmysql.dll. Now using MariaDB libmysql.dll (compatible with MySQL until 5.x) for x86 builds and libmariadb.dll for x86_64 builds, which supports MariaDB and MySQL versions above.
Switching from Make to Ninja for automatic Linux builds.
