Determine name of library installation directory, i.e. "lib" vs "lib64",
which differs between all Debian-based vs all other Linux distros.
See cmake bug #11964, http://cmake.org/gitweb?p=cmake.git;a=commit;h=126c993d
Also provide a script for older (<=2.8.4) cmake
Added missing CMake defines for SVN_CLIENT.
Don't detect libsvn without APR.
When installed, enable libsvn support by default (same as for automake).
When enabled, provide libsvn include dir to libtsync.
gitignore temporary CMake files