Merge pull request #50 from asgeirn/master

Fixed SPEC file to work with Red Hat 6.3 x64.
New version : 1.9.0

 - Use _stat64 on windows so file sizes become 64bit always.
 - Increase default marshalling buffer so we can marshall large PDUs.
 - RPC layer support for NFSv2
 - Win32 updates and fixes
 - Add URL parsing functions and URL argument support.
 - New utility: nfs-io
 - nfs-ls enhancements
 - RPC layer support for NSM
 - Add example FUSE filesystem.
 - Minor fixes.
Add support for chdir and getcwd

Add chdir and getcwd and store cwd in the nfs_context.
Add functions to process the paths specified and normalize them
by performing the transforms :
    // -> /
    /./ -> /
    ^/../ -> error
    ^[^/] -> error
    /string/../ -> /
    /$ -> \0
    /.$ -> \0
    ^/..$ -> error
    /string/..$ -> /

Update the path lookup function to allow specifying relative paths based on
cwd for all functions.