Update netscript documentation.

Unfortunately, I haven't used most of the specialty APIs yet, so I'm not intimately familiar with where their documentation might be wrong. I figured some fixes were better than no fixes, and I can always make more fixes later.

Fixes #1023.

doc/source/netscript/formulasapi/hacknetNodes/constants.rst

@@ -6,21 +6,28 @@ constants() Netscript Function
     :RAM cost: 0 GB
     :returns: A structure with various constants related to hacknet nodes.
 
+    If you are not in BitNode-5, then you must have Source-File 5-1 in order to
+    use this function.
+
+    Returns an object with the following properties::
+
+        {
+            MoneyGainPerLevel: Multiplied by the node's level to get the node's base income
+            BaseCost:          A multiplier used when buying new nodes or upgrading levels
+            LevelBaseCost:     A multiplier used when upgrading levels
+            RamBaseCost:       A multiplier used when upgrading RAM
+            CoreBaseCost:      A multiplier used when buying additional cores
+            PurchaseNextMult:  The root of an exponent used when buying new nodes
+            UpgradeLevelMult:  The root of an exponent used when upgrading levels
+            UpgradeRamMult:    The root of an exponent used when upgrading RAM
+            UpgradeCoreMult:   The root of an exponent used when buying additional cores
+            MaxLevel:          Maximum level a node can have
+            MaxRam:            Maximum RAM a node can have
+            MaxCores:          Maximum number of cores a node can have
+        }
+
     Examples:
 
     .. code-block:: javascript
 
-        {
-            MoneyGainPerLevel
-            BaseCost
-            LevelBaseCost
-            RamBaseCost
-            CoreBaseCost
-            PurchaseNextMult
-            UpgradeLevelMult
-            UpgradeRamMult
-            UpgradeCoreMult
-            MaxLevel
-            MaxRam
-            MaxCores
-        }
+        tprint("Maximum RAM a hacknet node can have: "+formulas.hacknetNodes.constants().MaxRam+" GB.");