Debian: Creating a new fourth package by splitting the i2p package in two

 This commit splits the i2p package into a second package, i2p-router.
   * The new 'i2p-router' package does not depend on the java-wrapper nor jbigi.
     Jbigi is recommended. This package can be installed on the ports or 
     distributions that the java-wrapper is not available for.
   * The new 'i2p' package depends on i2p-router, libjbigi-jni, and the java-wrapper. 
     This package will add the i2psvc system user and the initscript. Existing
     users of the i2p package will have the i2p-router package pulled in
     automatically and for them there will be no usability changes.

 Executive summary: No functionality changes will take place for either those
		    that installed the i2p package in the past or those that
		    install the newly split i2p package. For them, "The Song
                    Remains the Same."