First pass at documentations.

config.go

@@ -11,6 +11,9 @@ import (
 	"strings"
 )
 
+// Config embodies the configuration for a game. These are populated in various
+// ways (json POSTed to server, config file, constants) and are typically owned
+// by a Controller.
 type Config struct {
 	Tick      int     `json:"tick"` // ms
 	Timescale float32 `json:"timescale"`
@@ -23,8 +26,8 @@ type Config struct {
 }
 
 const (
-	TICK         = 60
-	TIMESCALE    = 1.0
+	TICK         = 60  // ms, this is how often physics is updated
+	TIMESCALE    = 1.0 // this tweaks the temporal duration of a TICK
 	WIDTH        = 800
 	HEIGHT       = 550
 	OBSTACLES    = 5
@@ -32,6 +35,10 @@ const (
 	DEFAULT_MODE = "deathmatch"
 )
 
+// LoadConfig takes the location of a json file that contains values desired to
+// be used in the creation of games. Priority is given to values specified at
+// game cration time using control channel, followed by values in config file,
+// followed by constants defined above.
 func LoadConfig(filename string) (Config, error) {
 	c := Config{
 		Tick:      TICK,