Merge pull request #56 from Ms2ger/JSVal-fix

In Int32Value, cast to u32 before casting to u64.
Merge pull request #58 from larsbergstrom/rust_20140224b

Rust 20140224b
Merge pull request #59 from larsbergstrom/clean_rlib

Clean rlib files
Remove GetReservedSlot and shadow code to support it.

We don't currently use it in Servo, and we don't have static assertions to
ensure the correctness of the shadow structures, so I believe it's better
not to have the code at all.
Produce dylib and rlib
Merge pull request #57 from Ms2ger/GetReservedSlot

Remove GetReservedSlot and shadow code to support it.
Merge pull request #60 from mozilla-servo/rustup_20140321

Update to current rust
Remove os::page_size() from stack calculation (fixes #61).
Merge pull request #62 from mozilla-servo/rustup_20140321

Remove os::page_size() from stack calculation (fixes #61).
Support for Android
Merge pull request #63 from larsbergstrom/dylib

Android support
Remove an unused import from js.rc.
Merge pull request #64 from mozilla-servo/unused-import

Remove an unused import from js.rc.
Run tests in green tasks.
Merge pull request #65 from jdm/rustup2

Run tests in green tasks.
Kill the crust module.
Add gczeal and more jsval helpers.