Splited expression.rs into small files
Merge pull request #61 from Coeuvre/expression

Splited expression.rs into small files
Upgrade to latest Rust
Merge pull request #75 from bvssvni/expression

Upgrade to latest Rust
Added Piston as dependency

Closes https://github.com/PistonDevelopers/rust-event/issues/76
Merge pull request #77 from bvssvni/expression

Added Piston as dependency
Return `Status` to express behaviour

Closes https://github.com/PistonDevelopers/rust-event/issues/79

* Updated Rust-Empty to build examples
Merge pull request #80 from bvssvni/expression

Return `Status` to express behaviour
Fixed comment
Merge pull request #81 from bvssvni/expression

Fixed comment
Added `Invert` decorator

Closes https://github.com/PistonDevelopers/rust-event/issues/82
Merge pull request #83 from bvssvni/expression

Added `Invert` decorator
Added delta time for actions

Closes https://github.com/PistonDevelopers/rust-event/issues/84
Merge pull request #85 from bvssvni/expression

Added delta time for actions
Added more docs for `Sequence`
Merge pull request #87 from bvssvni/expression

Added more docs for `Sequence`
Fixed docs for `Wait`
Merge pull request #88 from bvssvni/expression

Fixed docs for `Wait`
Added `Select` composite

Closes https://github.com/PistonDevelopers/rust-event/issues/86
Merge pull request #90 from bvssvni/expression

Added `Select` composite