Bump the version to 1.4.3

Bump the version to 2.0b6

Update version to 2.0b5

Update version to 2.0b4

Update version to 2.0b3

Update revision to 2.0b2

Update version to 2.0b1

Move the version to a separate file

Add support back for jumbo instructions

Support for these is no longer controlled by the api, but rather
by the -J option.

Update version to 1.4.0