Fixed major issues with code formatting

The release fixes code formatting issues by adding code and pre tags

Updated HTML format

Added contenteditable=false to a surrounding div

Cleaner HTML

• Fixed a bug where the standard github/gist links were not being converted
• Fixed internal issue where html being produced was excessively large after deleting line numbers

Extra Functionality Fix

• Last release failed to publish. For information on this release, see last release

Extra Functionality

Options now include

• Remove footer
• Remove line numbers
• Include only a range of lines

Basic Functionality

This release should have the basic functionality that I am looking for. After some small improvements, including testing, it should be done