libtorc-core: Fix clang warning in TorcWebSocket
configure: Make libfreetype support optional

- workaround for missing pkg-config on OS-X
- add warning that BD-J support not available
configure: Update configure.diff
libtorc-video: Add warning about BD-J support in project file
libtorc-video: Minor typo
libtorc-core: Complete TorcPowerOSX documentation.
libtorc-video: Minor typo