Added Instructions
Move Pattern.my to Patterns.my

--HG--
rename : lib/pegleromyces/Pattern.my => lib/pegleromyces/Patterns.my
rename : spec/Pattern.test.my => spec/Patterns.test.my
Added basic machine Instructions
Added pushing of instructions into Program#sequence with method_missing
Extend implementation of Machine with other state vars and an execute method (untested)
Added Constructions

--HG--
extra : amend_source : da84ed6e5a9311b5e5a7a2d7b596c11a6159d6f4
Add another aesthetic decorator to BasicSpec: 'specify'
Added Constructions for Character, CharacterString, PositivePredicate, and OrderedChoice