Pyramid driver:

- Convert set_char to 8 byte bitmap.
- Reset ccmode on clear. Add a custom character cache to avoid unnecessary
  updates of custom characters because of the reset.
- Add support for bignum.
- Remove the FB_modified flag, it did never work. Instead add a backing store
  buffer to compare against. Remove the 40ms block of updates, this was a
  no-op as well. However, pause 40ms after sending a complete screen update.
  The display I have requires this to recognize the following cursor updates.
- Do not treat frame buffer as string. Always use memcpy, memcmp, and memset.
- Remove the changelog. This should be read from SCM.
- Remove contact info as T. Riewe has left Pyramid.
- Pass through indent, preserving 4 space indention.

server/drivers/Makefile.am

@@ -60,7 +60,7 @@ MtxOrb_LDADD =       libLCD.a libbignum.a
 mx5000_LDADD =       @LIBMX5000@
 NoritakeVFD_LDADD =  libbignum.a
 picolcd_LDADD =      @LIBUSB_LIBS@ libLCD.a libbignum.a
-pyramid_LDADD =      libLCD.a
+pyramid_LDADD =      libLCD.a libbignum.a
 serialPOS_LDADD =    libbignum.a
 serialVFD_LDADD =    libLCD.a libbignum.a
 shuttleVFD_LDADD =   @LIBUSB_LIBS@