Rename libsysTools avoid clobbering the external sysTools package.

Since sysTools the package exists, we need to rename our version of
kwsys to be RemusSysTools to avoid a name collision.
Merge pull request #95 from robertmaynard/rename_systools

Rename libsysTools avoid clobbering the external sysTools package.
Suppress visual studio 'safe' crt warnings in cJSON.
Suppress visual studio warning of using std::copy with pointers.
Explicitly cast from std::size_t to int to eliminate warning.