CacheStrategy: remove usage of emulated win32 functions, switch to internal VFS
[tests/darwin] - fixed g_sysinfo.GetManufacturerName() test on osx
[vfs] IFile::Read and all derived classes: change to use size_t/ssize_t, do not use more than SSIZE_MAX of buffer for "Read()", small related fixes
[vfs] Change CFile::Read() to use size_t/ssize_t; add checks for "Read()" return values; some fixes for new types in "Read()"; update types in code to match 'ssize_t' returned by 'Read()'; some usage of negative return values for Read()
ZipManager::GetZipList: use auto_buffer, fix improper use of std::string internal buffer
Reflect int64_t -> size_t changes for "Read()" to Addons
[vfs] IFile::Write and all derived classes: change "int Write(void*, int64_t)" -> "ssize_t Write(void*, size_t)"', small related fixes
[vfs] Change CFile::Write() to use size_t/ssize_t; add checks for "Write()" results; check for negative values; update types to ssize_t
Reflect int64_t -> size_t changes for "Write()" to Addons
Merge pull request #4962 from Karlson2k/vfs_update_05_alt
Merge pull request #5476 from Karlson2k/cachestrat_upd_01

CacheStrategy: remove usage of emulated win32 functions, switch to internal VFS
fixed: use the proper make instead of calling 'make' directly

fixes builds on freebsd
cmake buildsystem
add tests needed by new u16 string stuff
wrap cmyth properly
move some more install related stuff to install script
move all install code to platform install script
allow building without doxygen
fix building with yajl2
generate scripts in a subdir to avoid problems configuring in top dir