Fixed spacing

Fixed end-of-line comment spacing
Added comment

Added comment to explain function purpose
Added comment

Added end-of-line comment to explain variable assignment
Display <img> tag

Display HTML <img> tag that uses Relogo API for the user to display
image elsewhere.
Updated version

Updated plugin version to 0.3.0
Updated changelog

Added new features in 0.3.0 to changelog
Updated version

Updated plugin version to 0.3.0
Allow SVG upload

Enable uploading of SVG files to WordPress media library