Add linting for `crate_type` attribute values.

This ensures that the `crate_type` attribute always contains a value,
and does not contain an invalid value.
Update references to rustc.rc in README.
Update AUTHORS.txt for 0.9
Bump more version numbers to 0.9
Give more effusive credit to authors
Bump version to 0.9
libextra: Add benchmarks for ebml::reader::vuint_at()
libstd: Always inline all byteswap functions
fixup! libstd: Always inline all byteswap functions
Abort on double-failure. #910

Previously this was an rtabort!, indicating a runtime bug. Promote
this to a more intentional abort and print a (slightly) more
informative error message.

Can't test this sense our test suite can't handle an abort exit.
auto merge of #11275 : matt-auld/rust/update_readme, r=pcwalton
auto merge of #11276 : brson/rust/0.9, r=pcwalton
Remove std::either
Change rmake and doc-test to support TESTNAME

Closes #11288
Closes #11222
Fix windows dist script

In copying the license for the third-party bins it is attempting
to delete a directory that doesn't exist.
auto merge of #11149 : alexcrichton/rust/remove-either, r=brson

Had to change some stuff in typeck to bootstrap (getting methods in fmt off of Either), but other than that not so painful.

Closes #9157
auto merge of #11264 : am0d/rust/crate_type_lint, r=alexcrichton

This ensures that the `crate_type` attribute always contains a value,
and does not contain an invalid value.

Fixes #11256.
libsyntax: De-`@mut` `ParseSess::included_mod_stack`
librustc: De-`@mut` the parse session
libsyntax: De-`@mut` `StringReader::pos`