mtn-ignore tweak

These were used to create the jcpuid-x86-windows.dll

  - trimMtnRev: create a new property with the revision trimmed to  8 characters.
  - getExtendedVersion: create a new property that includes the full version with the shortened MTN revision tacked on
  - debchange:  automatically update debian/changelog with the I2P version. Called by the "debian" target unless the property noAutoDebchange is set.
  - debian-tarball: export i2p.i2p branch to a new directory, remove the binaries like jbigi and launch4j, and create a tarball.
* move packages created by "ant debian" to ${basedir}
* add debian/changelog to .mtn-ignore since it is now automatically updated (by default).
* add *.deb to .mtn-ignore

properties file.

Instead of deleting debian/copyright with "ant clean", add it to .mtn-ignore.
With the current method, the copyright file doesn't end up in the debian source
package...