Set default version number to 2.8.0

For if someone else wants to make a release.
I'm also adjusting the descriptions of these numbers to what is more realistic, what I've actually been doing with these version numbers. We're not a library that needs to maintain compatibility downstream.

CMakeLists.txt

@@ -9,9 +9,9 @@ cmake_minimum_required(VERSION 3.10.2) #Oldest version it's been tested with.
 #Project metadata.
 set(SETTINGSGUIDE_PLUGIN_NAME "Settings Guide" CACHE STRING "The name of the plug-in in distribution.")
 set(SETTINGSGUIDE_PLUGIN_ID "SettingsGuide2" CACHE STRING "The plug-in ID of the installation in Cura.") #Needs to be '2' because the original plug-in ID was reserved by Asasin for his original version.
-set(SETTINGSGUIDE_VERSION_MAJOR 2 CACHE STRING "The major version number, indicating a backward compatibility break.")
-set(SETTINGSGUIDE_VERSION_MINOR 7 CACHE STRING "The minor version number, indicating a forward compatibility break.")
-set(SETTINGSGUIDE_VERSION_PATCH 1 CACHE STRING "The patch version number, indicating an incremental improvement without compatibility break.")
+set(SETTINGSGUIDE_VERSION_MAJOR 2 CACHE STRING "The major version number, incremented when there is a significant rewrite.")
+set(SETTINGSGUIDE_VERSION_MINOR 8 CACHE STRING "The minor version number, incremented when there are new features.")
+set(SETTINGSGUIDE_VERSION_PATCH 0 CACHE STRING "The patch version number, incremented if there are only bug fixes and article changes.")
 set(SETTINGSGUIDE_SUPPORTED_SDKS "6.0.0;7.0.0" CACHE STRING "List of supported Cura SDK versions.")
 
 #Make sure we have Mistune.