Fixed an issue with lua context manager, tested to make sure it worked, started a document for the algorithm lua structure, updated engine loop

documents/algorithms.txt

@@ -0,0 +1,14 @@
+Dungeon generation algorithms are written in lua and dropped into scripting->algorithms. They are automatically parsed by the visualizer and assigned keys in the program to run them.
+Algorithms are made up of a single lua file (possibly more with requires) with the following functions:
+
+initialize()
+Initializes the algorithm and returns a structure/table with the following fields:
+{
+    updates_per_second: int // Number of times the algorithm's update function should be called per second. Minimum of 1, converted into frames per update with a minimum of 1.
+    free_data: table // Free table that the developer can store necessary state data in
+}
+
+update(state)
+
+The following functions are available to algorithms in either their update or initialize functions:
+