This closes #6.
Merge remote-tracking branch 'd3zd3z/big-align'
* d3zd3z/big-align:
bootutil: Fix issue with align > 1
sim: Set version numbers in images
sim: Add some debug code to dump images
sim: Write image_ok properly
sim: pad images to alignment
sim: Make misaligned writes panic
sim: Be consistent about flash alignment
sim: Verify write alignment
sim: Add the K64fBig target
k64f: change flash device name
scripts: Allow image version number
scripts: Remove .pyc file from repo
Add some simple scripts for signing/flashing