bug fix: prevent compilation failure by prepending std:: to cout,endl
kludges to get compilation on jenkins linux
another kludge to fix jenkins linux build
 - removed ZC first half-related code (not doing rate-limiting) except in ZC FSM, which needs fixing
 - also fixed enum declaration
bug fix: capitalization was incorrect
fix libzerocoin building
script: we will not do stack-based interpretation of these opcodes, but rather template matching