Update mainpage and tutorials

etc/doxygen/mainpage.dox

-/**
-
-\mainpage
-
-\li \subpage ArmarXGui-Overview Overview
-\li \subpage ArmarXGui-HowTos ArmarXGui HowTos
-\li \subpage ArmarXGui-FAQ "ArmarXGui FAQ"
-\li \subpage ArmarXGui-Components "ArmarXGui Components"
-\li \subpage ArmarXGui-GuiPlugins "ArmarXGui Gui Plugins"
-\li \subpage ArmarXGui-License "ArmarXGui License"
-
- */

etc/doxygen/mainpage.md

+\mainpage
+
+- \subpage ArmarXGui-Overview "ArmarXGui Overview"
+- \subpage ArmarXGui-HowTos "ArmarXGui How To's"
+- \subpage ArmarXGui-Tutorials "ArmarXGui Tutorials"
+- \subpage ArmarXGui-Components "ArmarXGui Components"
+- \subpage ArmarXGui-GuiPlugins "ArmarXGui Gui Plugins"

etc/doxygen/pages/Tutorials.dox

-/**
-
-\page ArmarXGui-Tutorials ArmarXGui Tutorials
-
-Tutorials from ArmarXGui:
-
-\li \subpage ArmarXGui-Tutorials-CreateGuiPlugin
-
-\li  \ref Component-RemoteGuiExample2 (Example component for how to use the RemoteGui)
-
-*/

etc/doxygen/pages/Tutorials.md

+# ArmarXGui Tutorials  {#ArmarXGui-Tutorials}
+
+Tutorials from ArmarXGui:
+
+- \subpage ArmarXGui-Tutorials-CreateGuiPlugin
+
+
+Examples:
+
+- \ref Component-RemoteGuiExample2 (Example component for how to use the RemoteGui)