More banners for appellate courts!

Features:

• Adds RECAP banners to the docket query pages on appellate courts(#335, #333)

Changes:

• Improve logic to identify attachment pages in district courts(#335)

Fixes:

• More robust logic to get the document_id from appellate courts after logging in to purchase a document(#340)
• Normalize document numbers from appellate courts that uses the pacer_doc_id instead of the regular docket entry numbering(#2877).