Compile ASN Module 25331-690 with Erlang

1. Split the origin ASN file(25331-690.txt): there are 5 modules in this file, so we need split it into 5 modules:

2. Class-definitions.asn

3. PDU-definitions.asn
4. InformationElements.asn
5. Constant-definitions.asn
6. Internode-definitions.asn

Each has the same structure:

<module-name> DEFINITIONS AUTOMATIC TAGS ::=
BEGIN
...
END

1. Compile modules according their dependencies. The order is:

   Constant-definitions -> InformationElements -> PDU-definitions -> Class-definitions -> Internode-definitions

The compile method is: in erlang shell($ erl), run "asn1ct:compile("PDU-definitions", [per, verbose]).".