issue 259 release v2.2.0

issue CompEvol#252 beautify XML from producer

correct v2.1.3 tag

Closes CompEvol#134. Upper limit on Yule birth.rate removed. Starting…

… value set to 1.

prepare pre-release 2.1.2

Fix slow BEAUTi import of allignments

exactly as it was!

make addon manager pick version dependent addons