core: Add a rand::Rand trait that is implemented by types that can be
randomly generated
Also adds Rng::gen() for generating any type that implements the Rand
trait
testsuite: Add test for #4523
oldmap: use &K instead of K in find and get

This reverts commit a4250a96fdf61142a9c8dbb6d37ae8435c99e396.

This is not the cause of the nonexhaustive-match failure.
libsyntax: no binary/hex float literals
got rid of last empty lines
`core::send_map` renamed to `core::hashmap`

Encountered this while trying to port rustsqlite to rust 0.6
rustc: Less copy
librustc: Change i1 to i8 for bools. Attempts to put out burning tree. rs=burningtree
remove issue #3148 workarounds (no longer needed)
treemap: get rid of some implicit vector copies
get rid of implicit vec copies in treemap iterator

Each call to next() was doing a copy rather than a move. There's
currently no way for this to be a method that uses &mut self, so it has
to be a free function. Closes #4763.
update treemap FIXME
treemap: make map_next and set_next public
remove old snapshot workaround from smallintmap
doc: improvements to version-stamp makefile logic.
librustc: Stop loading enum variant discriminants from memory
librustc: Attempt to put out burning tree by fixing translation of unary negation in boolean constants. rs=burningtree
auto merge of #4795 : catamorphism/rust/less-copy, r=catamorphism
auto merge of #4801 : z0w0/rust/randomtrait, r=graydon

Also adds Rng::gen() for generically generating any type that implements the Rand trait. There's no way to generate things with a length (for e.g. strings or vectors), because I can't think of an elegant way to do that. Maybe have a RandLen trait that inherits Rand?

This can be used for a quickcheck mechanism I'm working on.
Merge pull request #4811 from catamorphism/issue-4523-testcase

auto: testsuite: Add test for #4523