little bit of hard code clean up, soft coded the following cards and removed thier hard codes

Angelic Chorus
Lavaborn Muse
Pestilence
Living Artifact
Hypnotic Specter
there is test for each of these.
btw living artifact hard code was wrong, it was allowing you to remove counters at any phase, the soft code is actually correct. updated living artifact test to the correct version in next rev
also fixed a case where "thatmuch" was never set, i now also store the amount on the source of the trigger as well.

projects/mtg/src/TargetChooser.cpp

@@ -484,7 +484,7 @@ TargetChooser * TargetChooserFactory::createTargetChooser(string s, MTGCardInsta
                 else if (attribute.find("share!") != string::npos)
                 {
                     size_t start = attribute.find("share!");
-                    size_t end = attribute.find("!");
+                    size_t end = attribute.rfind("!");
                     string CDtype = attribute.substr(start + 6,end - start);
                     if(card->isSpell() && card->backupTargets[0]->typeAsTarget() == TARGET_STACKACTION)
                     {