Add estop switch base & filament dry box solution (VoronDesign#146)

Mods/synfinatic/E-Stop-Switch/README.md

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+# E-Stop Switch
+
+### Overview
+
+Designed to mount a [Uxcell Mushroom E-Stop Switch](https://www.amazon.com/gp/product/B008ZY8G5O/ref=oh_aui_search_detailpage?ie=UTF8&th=1) 
+(2.64x2x6.4x3.2") to the top of your printer.  Replaces one of the corner
+panel clips holding the plexi in place.  
+
+### Requirements
+
+Printed Parts:
+
+ * 1x E-Stop Base
+
+Hardware: 
+
+ * 1x Uxcell E-Stop Switch
+ * 2x M5x8mm socket cap bolts
+ * 2x M5 T-nut

Mods/synfinatic/Filament-DryBox/README.md

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+# Filament DryBox
+
+### Overview
+
+Designed to mount a [Rubbermaid 21 cup food storage container](https://www.amazon.com/gp/product/B00BEUDWIC/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1)
+to the side of the printer via the upper 2020 horizontal extrusion 
+for dry storage of filament during printing.  Tested to fit eSun 
+and Hatchbox spools.
+
+### Requirements
+
+Printed Parts:
+
+ * 1x Container Holder A
+ * 1x Container Holder B
+ * 2x Spool Base
+ * 2x Spool Brace
+ * 2x Spool Roller
+
+Hardware: 
+
+ * 1x PC4-M10 Straight Pneumatic Fitting
+ * 4x M5x8mm socket cap bolts
+ * 4x M5 T-nut
+ * 4x 608-2RS bearing or equivalent