fix Script#op_if and Script#op_notif
fix Script#op_pick and Script#op_roll
add missing Script#op_2rot
Upon parsing an invalid OP_PUSHDATA, append the invalid opcode to already parsed valid opcodes

On invalid OP_PUSHDATA, clear the added chunks.

test case for above changes
Remove 'rescue Exception'
Adding randomize_outputs method to builder
Added license section

Added license section and link to license file.
Updated license date

Changed date on license from 2011 to 2014.
use compressed public keys by default

NOTE: The KeyGenerator will now use different addresses than before!