Squashed 'tests/files/' changes from 6f75ca3..2bfb7db

2bfb7db update memory test
88f32fa Merge remote-tracking branch 'origin/PoC9' into PoC9
a1f73f9 update gas costs
e16b5d3 Move over to key value rather than array of arrays since they're unordered and no duplicates.
ac11bbc Merge branch 'PoC9' of github.com:/ethereum/tests into PoC9
93ae304 Move to non-repeated.
fd9e406 Added test 2

git-subtree-dir: tests/files
git-subtree-split: 2bfb7dbe09c62319b28a2c2873caf7e7e99bf32a