Add symlink to sketch directory in www directory.

Bump image version.
Change sketch extension to svg.
Default printer type to 'ultimaker'.

Makefile

@@ -116,6 +116,7 @@ endif
 	
 ### create links elsewhere in the system (autowifi)
 	$(LN) -s /$(TGT_LUA_DIR_SUFFIX)/script/d3dapi $(1)/www/cgi-bin
+	$(LN) -s /root/sketches $(1)/www/
 endef
 
 define Package/wifibox/postinst

src/FIRMWARE-VERSION

@@ -1 +1 @@
-0.9.6
+0.9.7

src/rest/api/api_sketch.lua

@@ -15,7 +15,7 @@ local M = {
 }
 
 local NUMBER_PAD_WIDTH = 5
-local SKETCH_FILE_EXTENSION = 'sketch'
+local SKETCH_FILE_EXTENSION = 'svg'
 
 
 -- creates sketch directory, and sets response to error state on failure

src/script/wifibox.uci.config

@@ -1,3 +1,6 @@
 config settings 'system'
         option logfile '/tmp/wifibox.log'
         option loglevel 'debug'
+
+config settings 'general'
+	option printer_type 'ultimaker'