Removes the obj system from the compiler.

Closes #1484

Aligning the type parameters of the ifaces, impls, and methods
correctly in typeck is almost brain surgery. Seems to work now for
everything I threw at it, but might still break in other corner cases.

Issue #1227

Closes #1383

this will address the (crashing) new test added.

Removes some more code duplication.

Issue #828

This is not a full solution yet. To really get sane error messages,
we'll also have to guess the name to apply to literals, which seems
non-trivial.

Also shuffles around the organization of numeric literals and types,
separating by int/uint/float instead of machine-vs-non-machine types.
This simplifies some code.

Closes #974
Closes #1252

It seems inefficient to copy them around. Let's measure whether that's actually
> the case

It's proving too inflexible, so I'm ripping out the extra complexity
in the hope that regions will, at some point, provide something
similar.

Closes #918

This is intended to solve the problem of how to pass arguments to
constructor functions -- you want to move in rvalues, but not have to
explicitly copy stuff that is not an rvalue. The by-copy passing
convention will ensure the callee gets its own copy of the value. For
rvalues, it'll just pass off the value. For lvalues, it'll make a
copy.

Issue #1177

It was printing option::t[int] instead of option::t<int>

Now they are both just proto_shared and proto_shared takes an
argument indicating that it is sugared as 'lambda'

Add sprinkle && throughout the compiler to make it typecheck again.

Issue #1008

Issue #409

Issue #918

This will be used in the near future to decide what can safely
be done with the returned reference.

Issue #918

tyencode/tydecode still don't know about it. return_ref will be extended to take
arguments anyway.

It will include information about returning by alias.

Long lines were fixed in a very crude way, as I'll be following up
with another reformat in a bit.