Move to SDK EInkDisplay and enable anti-aliased 2-bit text (#5)

* First pass at moving to SDK EInkDisplay library

* Add 2-bit grayscale text and anti-aliased rendering of text

* Render status bar for empty chapters

* Refresh screen every 15 pages to avoid ghosting

* Simplify boot and sleep screens

* Give FileSelectionScreen task more stack memory

* Move text around slightly on Boot and Sleep screens

* Re-use existing buffer and write to whole screen for 'partial update'

lib/EpdFont/builtinFonts/babyblue.h

@@ -2,6 +2,7 @@
  * generated by fontconvert.py
  * name: babyblue
  * size: 8
+ * mode: 1-bit
  */
 #pragma once
 #include "EpdFontData.h"
@@ -500,5 +501,5 @@ static const EpdUnicodeInterval babyblueIntervals[] = {
 };
 
 static const EpdFontData babyblue = {
-    babyblueBitmaps, babyblueGlyphs, babyblueIntervals, 5, 17, 13, -4,
+    babyblueBitmaps, babyblueGlyphs, babyblueIntervals, 5, 17, 13, -4, false,
 };