0.9.1

Merge pull request #23 from snipsco/release/0.9.1

Bump version to 0.9.1

0.9.0

• replace error-chain by failure
• refactor travis
• script to update cargo.toml version

0.8.1

• update dependencies

0.8.0

• Grammar analysis API
• new boundaries checker api

0.6.0

• stash indexing
• terminal and composition rules
• two tokens are "adjacent" only if there are separated by whitespaces (remove '-' character)

0.5.1

• Invalid production error management

0.5.0

• Add Boundaries checker configuration
• Fixes

0.4.2

bump to 0.4.2

0.4.0

Bump to 0.4.0

0.3.0

Bump to 0.3.0