Started work on, and finished first revison of, resolution of access
expressions. An access expression should either be resolved to:
- Argument access, if such is defined in the immediate lexical context
- Variable access, if such is defined in the immediate lexical context
- Field access, if such is defined in the immediate lexical context
- Self message
The current implementation lacks in performance in that redundant NONE
instructions are generated because each access results from 0 through 3
instructions. Due to the current jump implementation, this is a
quick-and-dirty implementation, which is to be changed after jump
implementation has been improved, such that resolution of variable
length instruction sequences can be postponed.

Signed-off-by: Jakob Brandsborg Ehmsen <jakobehmsen.github@gmail.com>