Added XCAPURI object to sipsimple.applications.util

Ignore-this: 63ea66a7aab261ae42c9d2c77df39104

darcs-hash:20090519030025-1e3d8-fe528efbea01c54e015fb604cdecf6644f6ddafc
Added Boolean datatype to sipsimple.applications.util

Ignore-this: 8a110e402ef21a40a0b8c1ffae4cfe55

darcs-hash:20090519030552-1e3d8-487f0ace24edf7408d3e18508316b5256613e4af