Flesh-out the docs

docs/api/scheme/process-context.md

@@ -1,9 +1,33 @@
 # Process-Context Library
 
-The `(scheme process-context)` library exports procedures
+The `(scheme process-context)` library exports procedures for accessing with the program's calling context.
-for accessing with the program's calling context.
+
+- [`command-line`](#command-line)
+- [`emergency-exit`](#emergency-exit)
+- [`get-environment-variable`](#get-environment-variable)
+- [`get-environment-variables`](#get-environment-variables)
+
+#command-line
+
+    (command-line)
+
+Returns the command line passed to the program as a list of strings.
+
+#emergency-exit
+
+    (emergency-exit)
+
+Terminates the program immediately. This is an alias of `exit`. 
+
+#get-environment-variable
+
+    (get-environment-variable name)
+
+Return the value of the given environment variable.
+
+#get-environment-variables
+
+    (get-environment-variables)
+
+Return a list of all the environment variables and their values.
 
-- `command-line`
-- `emergency-exit`
-- `exit`
-- `get-environment-variable`