Update git2-rs

This brings in a commit which enables global template options by default as part
of initializing new git repositories, allowing a templates to be used as part of
`cargo new`.

Closes #498
add codegen-units option to profile section
Update openssl-static-sys for ubuntu 10.04

This *should* help with #598, but I'd like to confirm that it's fixed with a
snapshot before marking it as fixed.
auto merge of #599 : epdtry/cargo/profile-codegen-units, r=alexcrichton

If the profile sets `codegen-units`, the value will be passed to `rustc`'s `-C codegen-units` option.  If no value is set, then no argument will be passed, so `rustc` will use its default settings.
Update windows downloads
auto merge of #596 : alexcrichton/cargo/update-git2, r=brson

This brings in a commit which enables global template options by default as part
of initializing new git repositories, allowing a templates to be used as part of
`cargo new`.

Closes #498
auto merge of #600 : alexcrichton/cargo/update-ssl, r=brson

This *should* help with #598, but I'd like to confirm that it's fixed with a
snapshot before marking it as fixed.
auto merge of #603 : brson/cargo/win, r=alexcrichton,alexcrichton,me
Register new snapshots

Closes #606
Closes #607