-added initial header to be consistent with other markdown pages
-changed "...lower level..." to "...higher level..."
-changed some italics to bold for consistency with other pages
-added menu location description for the Localization Perspective
-fixed "made" to "make"
-changed some description text in "Customizing CAVE Menus" to make sense
-added screenshot for that section
-commented out the NCP section since it doesn't apply to our current version
