Whole lot of Improvements - Change log 3.5.5

First off, a huge thanks to @fuzzlemann for contributing to this update.

This update brings a lot of Improvements, CPU Usage Graph & Bugfixes

New:

• CPU Usage Graphs (7d, 24h) - This may be unavailable on some machines due to JVM implementation. The load average may be unavailable on some platform where it is expensive to implement this method.
• Config options for not saving non-existing commands & for saving alias uses under the main commands.
• bStats metrics integration. https://bstats.org/plugin/bukkit/Plan

Improvements:

• Duplicate Sessions added due to reloads no longer affect the visualization of "Sessions" page
• Online graph on Inspect page now uses scatter graph as well.
• Geolocations for IPs now cached when fetched - More IPs can be fetched & improves performance.
• TPS calculation now utilizes Paper's method on PaperSpigot.
• Many small code optimization fixes
• Many code & string typo fixes
• Recent player buttons now use relative link.

Bugfixes:

• Fixed NPE that crashed the Webserver
• Fixed IllegalStateException: Duplicate key
• Fixed NullPointerException related to Vault Permission Table
• Fixed NoSuchMethodError related to ViaVersion db table
• Fixed NPE related to GriefPrevention claims

Other:

• Moved to using IntelliJ IDEA as IDE
• Project forks no longer require manual maven installs