add docs

doc/function/get_mse_version.txt

@@ -0,0 +1,7 @@
+Function: get_mse_version
+
+--Usage--
+> get_mse_version()
+
+Returns the current MSE app version in a string of the form:
+"major.minor.patch"

doc/function/index.txt

@@ -109,6 +109,7 @@ These functions are built into the program, other [[type:function]]s can be defi
 | [[fun:write_set_file]]	Write a MSE set file to the output directory.
 	
 ! Other functions		<<<
+| [[fun:get_mse_version]]			Get the MSE app version.
 | [[fun:trace]]			Output a message for debugging purposes.
 | [[fun:assert]]		Check a condition for debugging purposes.
 | [[fun:warning]]		Output a warning message.

tools/website/drupal/mse-drupal-modules/highlight.inc

@@ -100,6 +100,7 @@ $built_in_functions = array(
 	'write_image_file'	=>'',
 	'write_set_file'	=>'',
 	// other
+	'get_mse_version'			=>'',
 	'trace'			=>'',
 	'assert'		=>'',
 	'exists_in_package'		=>'',