Alpha Release

What's Changed

• Move all size variables and consts to usize by @alexmadeathing in #22
• Use existing consts directly rather than try to be clever by @alexmadeathing in #23
• Basic arithmetic by @alexmadeathing in #24
• Update inline code documentation by @alexmadeathing in #25
• Prepare for crates.io publish by @alexmadeathing in #26
• Fix cargo.toml warning by @alexmadeathing in #27
• Minor cleanup by @alexmadeathing in #29
• Minor cleanup by @alexmadeathing in #31
• Testing circleci by @alexmadeathing in #34
• Bump rust version in circleci config by @alexmadeathing in #35

Full Changelog: v0.2.0...v0.3.0