Initial commit

Robot, Position and Table classes all written.  Also have some rspec tests for them.
heaps of examples
Check for x and y when making position.
Added Simulator class, its tests and a Main to run everything

Simulator class will parse an instruction line and do the instruction to its Robot and Table.  Also including its tests.

The Main class is for interfacing with STDIN (and will be for reading from files etc later)
README for documentation
Don't need to output invalid command
I wondered what happened if you place twice.

Just the first place is valid. You must LIFT between places.
ignore emacs ~ files
Sweet VIEW command

shows a little picture of the table.
Bash script to run all the examples
make table look better