Initial commit
Correct typos and describe @eddyb and @anasazi proposals
Initial draft
RFC: Flexible target specification
Load from files only, remove `-T`

Also add `relocation-model`.
Add RUST_TARGET_PATH
Update for new features, target_foo, and remove mention of `-T`
Merge remote-tracking branch 'cmr/target-specification'
Flex targ specs is RFC 42
Merge remote-tracking branch 'nikomatsakis/box-not-special'
RFC 43
Merge remote-tracking branch 'nikomatsakis/closures'
Unboxed closures
Improve the issue reference format in headers.

Fixes #62. Of the formats proposed there, I went with option (e.c).