deprecated push_char -> push
remove unused LexWin
assert!(a == b) -> assert_eq!(a, b)
add wildcard version parsing (*, x.*, x.y.*)
add docs for wildcard versions
fix deprecation
Merge pull request #10 from steveklabnik/fix_deprecations

fix deprecation
Use modern travis config
Merge pull request #11 from steveklabnik/modernize_travis

Use modern travis config
add deny(missing_doc)

docs are good. let's do this.
add instructions to README
Add more docs
Add extra syntax examples
Merge pull request #12 from steveklabnik/docs

Docs
Merge pull request #9 from globin/wildcard_parsing

Support for wildcard requirements (*, x.*, x.y.*)
Switch to compatible by default, not exact
use slicing syntax