Bump version to 0.1.0

Moving off the 0.0 series is essential for semver to be effective.

Closes pulldown-cmark#76

Merge pull request pulldown-cmark#21 from google/issue20

End footnote definition with one blank line.

Merge pull request pulldown-cmark#61 from GuillaumeGomez/rustbuild

Add rustc_private feature as well

Merge pull request pulldown-cmark#60 from GuillaumeGomez/rustbuild

Put the correct feature

Merge pull request pulldown-cmark#59 from GuillaumeGomez/rust-build-s…

…ystem-compliant

Make pulldown-cmark library rustc build system compliant

Remove unwanted conditional compilation

Merge pull request pulldown-cmark#48 from GuillaumeGomez/full-html-spec

Full html spec

Fix compile error for rust 1.14

Newer rust doesn't need so much 'static in constants, but 1.14 does.

Fix off-by-one error in link ref scanning

In a link ref such as [`a`], it would jump one past the close of the
inline code and thus miss the closing bracket.

Also update bitflags version.

Fixes issue pulldown-cmark#18. Published as version 0.0.8.

Update version to 0.0.7

Push new version to fix footnote flag.