Compile order and individual options

Compile order and option overrides on file or match basis.
Also allow compilation of files with .asn extension together with .asn1.

What's Changed

• Compile order of ASN.1 files by @sebastiw in #17
• Add compile option overrides by @sebastiw in #18
• Allow .asn extensions by @sebastiw in #16

Full Changelog: 0.3.0...0.4.0