Fix typo
Merge pull request #183 from fletom/patch-1

Fix typo
Also ignore mpo files
Whitespace fixes
Less sketchiness
Fix typo (double together)
Clarify what the attacker wants to accomplish in an ECB oracle attack

Refs #186.
Clarify the symbols a little for ECB oracle attacks

Refs #186.
Clarify that we're comparing against a regular brute force attack

Refs #186.