Tweaks and Updates (#100)

* Change comment style to use folds, in turn necessitating changing the template delimeters

* Add "Underlined" styling

* Update the gui gutter foreground color

* Automatically generate terminal color palette files

* README.md: Add 'Relatives of onedark.vim' section

* README.md tweaks to (hopefully) make installation and troubleshooting easier.

* README.md: Update preview image information

* README.md: Re-update preview image information

* README.md: Fixed wording about italics troubleshooting screenshot

* README.md: "setting" -> "option" where appropriate

* README.md: Fix typos

term/One Dark.Xresources

@@ -0,0 +1,37 @@
+! special
+*.foreground:   #ABB2BF
+*.background:   #282C34
+*.cursorColor:  #ABB2BF
+
+! black
+*.color0:       #282C34
+*.color8:       #3E4452
+
+! red
+*.color1:       #E06C75
+*.color9:       #BE5046
+
+! green
+*.color2:       #98C379
+*.color10:      #98C379
+
+! yellow
+*.color3:       #E5C07B
+*.color11:      #D19A66
+
+! blue
+*.color4:       #61AFEF
+*.color12:      #61AFEF
+
+! magenta
+*.color5:       #C678DD
+*.color13:      #C678DD
+
+! cyan
+*.color6:       #56B6C2
+*.color14:      #56B6C2
+
+! white
+*.color7:       #ABB2BF
+*.color15:      #5C6370
+