[addet] Mineshaft [32x32]

[Seraph07]

Added more blocked fields.

Survivor values:
Easy: 117 -> 116
Medium: 122 -> 120
Hard: 127 -> 125

[author] => aleqqqs
[size] => 32x32
[starts] => 1
[ends] => 1
[splittings] => 0
[joins] => 0
[overgrounds] => 220
[undergrounds] => 8
[min_length] => 228
[max_length] => 228
[url] => http://www.creeptd.com/mapfiles/mineshaft.zip