Merge pull request #148 from lukechampine/scripting

fix signed message encoding
Add secret key gob encoding
Merge pull request #149 from JoshVorick/client

Add secret key gob encoding
add tests for op_verify
better interpreter debug output
rework conversion functions
make op_if absolute and add op_if_move
add DEBUG const
update bootstrapping process
switch everything over to little endian
fix DefaultScript