Update Sol-20 keyboard to use fixed footprints

- Update all footprints on sol-20 keyboard and aligners

- Add soldermask clearance around cherry MX posts

- Move Cherry MX pads down 1 mil, and Futaba pads up 2 mils

- Adjust Cherry aligner footprints down 1 mil

- Adjust Futaba aligner footprints up 2 mils

- Move mounting slots up 1 mil on Cherry aligner

- Move mounting slots down 1 mil on Futaba aligner

- incorporate improved stabilizer post adapters in futaba aligner

- add slots for stabilizer posts in futaba aligner and Sol kebyoard PCB

- Move stabilizer bar bend guide to left bottom edge to facilitate bending

- Bump rev to 1.6

hardware/keyboard-sol/kbd-sol.sch

@@ -5,8 +5,8 @@ $Descr USLetter 11000 8500
 encoding utf-8
 Sheet 1 4
 Title "Sol-20 keyboard"
-Date "2020-05-05"
-Rev "1.5"
+Date "2020-08-15"
+Rev "1.6"
 Comp "OSIWeb.org"
 Comment1 "Main sheet with connector"
 Comment2 ""

hardware/keyboard-sol/keys1.sch

@@ -4,9 +4,9 @@ EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
 Sheet 3 4
-Title "Universal Retro Keyboard"
-Date "2020-05-05"
-Rev "1.5"
+Title "Sol-20 keyboard"
+Date "2020-08-15"
+Rev "1.6"
 Comp "OSIWeb.org"
 Comment1 "Key Matrix part 2"
 Comment2 ""

hardware/keyboard-sol/keys2.sch

@@ -4,9 +4,9 @@ EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
 Sheet 2 4
-Title "Universal Retro Keyboard"
-Date "2020-05-05"
-Rev "1.5"
+Title "Sol-20 keyboard"
+Date "2020-08-15"
+Rev "1.6"
 Comp "OSIWeb.org"
 Comment1 ""
 Comment2 ""

hardware/keyboard-sol/keys3.sch

@@ -4,9 +4,9 @@ EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
 Sheet 4 4
-Title "Universal Retro Keyboard"
-Date "2020-05-05"
-Rev "1.5"
+Title "Sol-20 keyboard"
+Date "2020-08-15"
+Rev "1.6"
 Comp "OSIWeb.org"
 Comment1 "Key Matrix part 2"
 Comment2 ""