Build problems with newest rust nightly

[mruegenberg]

The newest nightly (rustc 0.11.0-pre-nightly (d92926c 2014-05-16 01:06:25 -0700)) gives me several build errors along the lines of

error: mismatched types: expected `Modifiers` but found `core::option::Option<Modifiers>` (expected struct Modifiers but found enum core::option::Option)

and

error: type `&mut core::fmt::FormatWriter` does not implement any method in scope named `write_fmt`

The full build log is here.

[mruegenberg]

I don't know if this is an actual fix, but the FormatWriter errors disappeared by replacing f.buf with f at all the offending locations in lib.rs.

[metajack]

The other errors are due to needing to revert the Rust bug workaround introduced by #147

[luqmana]

I have a patch for the rust bug which will hopefully land soon: rust-lang/rust#14121

[brendanzab]

Is this fixed?

[mruegenberg]

Thanks, it's fixed now.

btw: It would be nice if the Travis build status were displayed in the readme.