Flexible Procedure/Service codetypes
-Place an index on the code_type column in the codes table
-Increase size of code_type column in the codes table (smallint)
-Increase size of code_type column in the billing table (varchar(15))
-Increase size of modifier column in the codes and ar_activity table (varchar(12))
-Place code_types (inactive) for CPTII,ICD9-SG and ICD10-PCS (Change the labels of
the current ICD dx code types and table search methods to clarify)
-Documented the custom/code_types.inc.php script with DocBlock comments
-Cleaned up the queries in the custom/code_types.inc.php script