Merge branch 'develop' into FileLoadIssue
Using getResourceAsStream

For all SGF related resources
resolves concurrency exceptions

(Done by a deep copy, but use of iterator() also prevents it, here
because I perform operations, makes more sense this way...)
Changes SGF project location to be under Core
Removes the old version of rummy
Merge branch 'FileLoadIssue' into develop
Merge branch 'develop' into checkers2