Added more documentation

Only the "Big Features" need to be properly documented

docs/challenges.md

@@ -0,0 +1,36 @@
+#Challenges
+
+Challenges are stored in the following format:
+
+challs: {
+  rows: # of rows
+  cols: # of columns
+  11: {
+    [insert challenge info here]
+  }
+  etc
+}
+
+Each challenge should have an id where the first digit is the row and the second digit is the column. Individual upgrades can have these features:
+
+name: Name of the challenge
+
+desc: A description of what makes the challenge a challenge
+
+reward: A description of the reward's effect
+
+effect() - Optional, calculate and return the values of this upgrade's effects or effects.
+
+effectDisp(x) - Optional, returns a display of the current effects of the upgrade with formatting. Default behavior is to just display the number appropriately formatted.
+
+goal: A Decimal for the goal of the challenge's value.
+
+currencyDisplayName: Optional, if using a goal currency other than basic Points, the name to display for that currency
+currencyInternalName: The internal name for that currency
+currencyLayer: The internal name of the layer for that currency. If it's not in a layer, omit.
+
+unl() - Return a bool to determine if the challenge is unlocked or not.
+
+onComplete() - Optional, this function will be called when the challenge is newly completed.
+
+countsAs: An array of ids of other challenges in this layer that being in this challenge "counts as" being in.