Make addl_lib_search_paths a HashSet (Closes #7718).
Make the documentation for std::task::spawn_sched render correctly.

Currently each line is a separate bullet point in a list: http://static.rust-lang.org/doc/master/std/task/fn.spawn_sched.html
make the bottom type immediate

Before:

    define void @_ZN3bar19h9d9b965357abc043af4v0.0E({}* noalias nocapture readnone sret, { i64, %tydesc*, i8*, i8*, i8 }* nocapture readnone)

After:

    define void @_ZN3bar19h9d9b965357abc043af4v0.0E({ i64, %tydesc*, i8*, i8*, i8 }* nocapture readnone)
rustpkg: Build dependencies into the correct workspace when using --rust-path-hack

When invoked with the --rust-path-hack flag, rustpkg was correctly building
the package into the default workspace (and not into the build/ subdirectory of the
parent directory of the source directory), but not correctly putting the output
for any dependencies into the default workspace as well.

Spotted by Jack.
mark bounds check failures as the cold path

LLVM is unable to determine this for most cases.

http://llvm-reviews.chandlerc.com/D2034 needs to land upstream before
this is going to have an effect. It's harmless to start generating the
expect hint now.
auto merge of #10107 : thestinger/rust/immediate, r=huonw
auto merge of #10089 : pythonesque/rust/issue-7718, r=catamorphism

Seems pretty straightforward, but please let me know if I'm doing something wrong or the test needs to be rewritten.
Remove the extension traits for Readers/Writers

These methods are all excellent candidates for default methods, so there's no
need to require extra imports of various traits.
auto merge of #10079 : alexcrichton/rust/no-reader-util, r=brson

These methods are all excellent candidates for default methods, so there's no need to require extra imports of various traits. Additionally, this was able to remove all the weird underscores after the method names. Yay!
auto merge of #10095 : huonw/rust/master, r=cmr

Currently each line is a separate bullet point in a list: http://static.rust-lang.org/doc/master/std/task/fn.spawn_sched.html
auto merge of #10110 : catamorphism/rust/rustpkg-dependency-build-dir, r=metajack

r? @metajack When invoked with the --rust-path-hack flag, rustpkg was correctly building
the package into the default workspace (and not into the build/ subdirectory of the
parent directory of the source directory), but not correctly putting the output
for any dependencies into the default workspace as well.

Spotted by Jack.
auto merge of #10113 : thestinger/rust/expect, r=cmr

LLVM is unable to determine this for most cases.

http://llvm-reviews.chandlerc.com/D2034 needs to land upstream before
this is going to have an effect. It's harmless to start generating the
expect hint now.