Added a TODO

For anyone that wants to help me out -
see the TODO.
Simplified class / level progression

The idea of starting as some generic base
class and then moving on to a specialized
class, while not terribly unique or complex,
is nonetheless not the simplest starting
point. While my first game worked this way,
other people might prefer starting classes
to immediately confer attribute benefits.

It is pretty easy for a developer to fork
this project ad either revert or create their
own progression.
levels.json now goes up to level 10

Beefed it up a bit. For now, 'class' is not
a class. That is, there is no object for the
concept of character class. Class is just an
attribute of a character. It defines their
attribute bonuses at level up and will determine
what class skills they can access.
Added weapons, restricted equipment by class

Characters can now only equip weapons and armor
usable by their class. It fails in a shitty way
for now, but is sufficient to restrict the
builder programs. I also added some new weapons
and armor to everything.json