Bump hex to 0.6.4

Bump to v0.6.3

Mix bump to 0.6.2

Merge pull request akira#150 from akira/timex_dep

Timex update to 1.0.0 and hex bump

More unused var cleanup

Bump to 0.4.4

Mix bump to 0.4.0

Bump hex to version 0.3

Bump hex to 0.2.3 + contributors

Hex - bump version to 0.2.2