[Rails-devel] Push request: Enforcement of forced train purchases

[Frederick W. <fre...@go...>]

Would you please push this into origin/master?

---Frederick

commit 6acf6d95385c57d74a39781f5e14440f7eeb143c

    Added enforcement of forced train purchases

    Provides for functionality demanded by Feature Request 3040250 (and
    beyond).

    Built on existing preliminary code (associated todos / temp-comments
    are removed).

    Expanded company config for requirement on owning trains (yes / only
    if has route / no) according to
    http://www.fwtwr.com/18xx/rules_difference_list/9_2.htm

    Legacy save games remain usable as enforcement is turned off during
    game loading.

    No provision of automated test cases due to this turning off and
    because current test infrastructure does not support negative tests
    (ie., check for expected errors during game replay upon load).