New Fields, OSTI Hosted Content, and Cleanup

The following changes were made in this release:

• New Fields: Programming Languages, Documentation URL, and Version were added as optional fields on the input form.
• OSTI Hosted Content: DOE CODE now supports a new software availability that allows you to host your code in OSTI's publicly accessible Gitlab, while keeping your project closed source.
• Cleanup: Much of the project was reorganized to put almost all of the content in /src/main. The templates and log files are now in /src/main/resources. The javascript, css, and other web-based files are in /src/main/webapp. The java files are in /src/main/java.
• Filtering: The google replacer plugin in the pom.xml has been replaced with maven filtering
• No Local Json: The json files that were once local to the project have now been replaced with a background thread that runs once at deployment, and then once a day, every day. This thread calls a specified link to retrieve a series of lists of content that is used throughout the application. (e.g.: Programming languages)