* Fix checksum calculation for escape
 * Add vFlashWrite, vFlashErase and vFlashDone

Closes #159

 * Convert `sandbox` to `template`

 * Resolving unlock bug in halt mode modification.
 * Start to generalize block sizes.
 * Allow for full-erase-fast-program.
 * Almost have USB bootloader working.

2. Remove ardulink warning - if someone adds support they add support, if not no need for a warning.

+ remove round up in -r mode to read the requested amount of bytes
+ remove the 0x307 check and stash the old ReadBinaryBlob method

Signed-off-by: bmx <none>