Closes #711
- Bump copyright headers to 2015 - [devtools] Rewrite fix-copyright-headers.py - [devtools] Use git pretty-format for year parsing Github-Pull: #7205 Rebased-From: fa6ad855e9159b2247da4fa0054f32fa181499ab fa24439ff3d8ab5b9efaf66ef4dae6713b88cb35 fa71669452e57039e4270fd2b33a0e0e1635b813
As suggested by Greg Maxwell-- unit test to make sure a block with a double-spend in it doesn't pass validation if half of the double-spend is already in the memory pool (so full-blown transaction validation is skipped) when the block is received.
