remove WIP code to compile to ruby or javascript
Version bump to 0.7.3
update gemspec
update travis build config
remove rbx from travis build config
cleanup the code and improve documentation
Version bump to 0.8.0
update gemspec
Set ENV to test, update Guardfile
In test mode re-compile grammar each run
Comment on grammar and problems
Pending spec for when real numeric handling is in
Merge remote-tracking branch 'origin/master' into feature/modelling-fixups

Conflicts:
	Gemfile
	Gemfile.lock
	lib/soroban/cell.rb
	lib/soroban/functions.rb
	lib/soroban/helpers.rb
	lib/soroban/parser.rb
	lib/soroban/parser/grammar.treetop
Remove incompatible gems

Debugging and Guard are difficult to get working across all rubies, leave it up to the developer to setup for their environment
Fix up after merge