Map :._- to straight web actions.

Fixes #125

resources/inputmaps/keyboard.json

@@ -15,6 +15,9 @@
     // map Num+X and Shift+X to X. This allows normal number input
     "(?:Num\\+|Shift\\+)?([0-9])": "%1",
 
+    // map some other normal buttons that might be useful
+    "(?:Shift\\+)?(\\.|\\-|\\:|\\_)": "%1",
+
     // map Shift+Letter to action jump+letter
     "Shift\\+([A-Z])": "jump+%1",