added all_entities, [set_]entity_loc, and [set_]entity_velocity, has_storm, has_thunder, and set_thunder
Merge pull request #81 from jb-aero/pullable

entity and weather updates
let all_entities take a location array
Merge pull request #87 from jb-aero/pullable

let all_entities take a location array
Added inventory stuff.
Merge pull request #86 from EntityReborn/master

Added inv stuffs to support an extension.
Added documentation on strings, and updated several other files, including an update to the ByteArrays class.
Merged in from master