* [DEV-18] changed CSV/CLTV to be regular op codes, and returned nop2 and nop3 to be regular nops
* [DEV-18] remove csv/cltv flags - part 1
* [DEV-18] remove csv/cltv flags - part 2
* [DEV-18] remove csv/cltv activation rules
* [DEV-18] remove csv/cltv activation rules
* [DEV-18] csv_fork_test fixes
* [DEV-18] readd chain params
* [DEV-18] readd chain params and remove csv activation rules
* [DEV-18] returned build flags to integration test
* [DEV-18] make csv/cltv to pop the the first element of the stack instead of peeking it
* [DEV-18] fix comments related to CSV/CLTV to remove any reference to soft fork
* [DEV-18] fix comments related to CSV/CLTV to remove any reference to soft fork
* [DEV-18] rename csv_fork_test.go to csv_fork.go
* [DEV-18] change mTx location
* [DEV-18] remove BIP0065Height
* [DEV-18] add function isUpgradableNop for readability