removed extra helper functions
refactor dockerfile builder
Merge pull request #153 from gregerg/refactor/dockerfile_builder

Refactor/dockerfile builder, closes #134
use readYAML helper functions, fixes #130
Merge pull request #155 from youreddy/readYAMLBug

use readYAML helper functions, fixes #130
Update README.md
fix bug that doesn't check for all states b2d vm can be in
Merge pull request #163 from gregerg/fix/lifter_init_b2d_state

fix bug that doesn't check for all states b2d vm can be in.  closes #162, also closes #135