Ports and improves accessable_storage.dm #142

Job	Run time
Collect data for other tasks	11s
Run Linters	2m 27s
Compile Maps	2m 24s
Windows Build	1m 52s
Integration Tests (birdshot) / run_integration_tests	8m 51s
Integration Tests (deltastation) / run_integration_tests	8m 54s
Integration Tests (gateway_test) / run_integration_tests	9m 46s
Integration Tests (metastation) / run_integration_tests	9m 1s
Integration Tests (icebox) / run_integration_tests	9m 13s
Integration Tests (multiz_debug) / run_integration_tests	8m 0s
Integration Tests (northstar) / run_integration_tests	10m 4s
Integration Tests (runtimestation) / run_integration_tests	7m 44s
Integration Tests (tramstation) / run_integration_tests	9m 21s
Integration Tests (wawastation) / run_integration_tests	9m 13s
Alternate Tests (515, 1627, runtimestation) / run_integration_tests	7m 39s
Check Alternate Tests	1s
Compare Screenshot Tests	19s
	1h 45m 0s

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