Fix up Bio-Formats POMs

This branch cleans up the Bio-Formats POMs. It does the following significant things:

1. Extends the `pom-scijava` parent. This eliminates a lot of boilerplate and inherits many automatic bugfixes and behavioral improvements compared to a parentless POM.
1. Fixes the broken ImageJ 1.x dependency.
1. Updates and simplifies the `license-maven-plugin` configuration based on recent improvements to that plugin.
1. Updates the project license and file header text to match the updated `license-maven-plugin` configuration.
1. Cleans up some whitespace and style issues.