Release work for v0.5.4 (#120)

Introduce JSON report

Bump version to 0.5.3

Update changelog and version number

Prepare for v0.5.2 release

Bump version number and update CHANGELOG to reflect the right details

Bump version and document v0.5.1 in the CHANGELOG

Update version v0.5.0 changelog

Bump version to v0.4.2 and add details to CHANGELOG.md

Do not include bin directory files in .gem package

Update CHANGELOG.md with v0.4.0 details

Bump version to v0.3.2

Bump version to 0.3.1