Inventory

[AndKram]

From #797. Added missing mission.xml changes. Adjusted the default amount(s) attributes in MissionHandlers.xsd. Currently failing PythonIntegrationTests_inventory_test.

[AndKram]

I think the reward needs updating with something like:
int dimension = params.getDimension();
float adjusted_reward = this.adjustAndDistributeReward(
((BlockOrItemSpecWithReward) matcher.matchSpec).getReward().floatValue(),
params.getDimension(),
((BlockOrItemSpecWithReward) matcher.matchSpec).getDistribution());
addCachedReward(dimension, adjusted_reward);

in all the RewardFor*.getMatch() methods.

But the test assumes that the reward is given each time the number of items are collected.

[AndKram]

Now restored backwards compatibility. Need more testing of new functionality.