OCaml: Handle some edge cases; refactor parser, main.ml; add config fetcher

ocaml/lib/utilities/aliases.ml

@@ -1,5 +1,9 @@
 (* an 'alias' is an alternate name with minor or no alterations to behavior *)
 
+(* exceptions *)
+exception Malformed_source = Exceptions.Malformed_source
+exception Malformed_state = Exceptions.Malformed_state
+
 (* logging *)
 let print = print_endline
 let elog = Log.elog
@@ -9,6 +13,7 @@ let str_int = string_of_int
 let chars_str = Text.chars_of_string
 let str_chars = Text.string_of_chars
 let str_char = String.make 1
+let str_dbool = Schema.string_of_default_bool
 
 (* control flow & precedence *)
 let ($) = (@@)