remove unused method from pack model
pass in options from get-verses script, remove newlines from references passed in
update verse model to support reference_requested parameter, add path
parameter to Verse model

update BibleSearch model to accept single verse string in addition to an array of verse strings

refactor parts of BibleApi
* split out get_verses and get_verses_needed methods to make it easier
  to change them
* collect copyright, path, and reference_requested info for verse
* call API for verses individually so we can easily pair
  reference_requested with the resulting verse
* add sleep constant and pause between each API call
add retries support to curl calls
eliminate duplicate verse lookups by getting unique entries from versesNeeded
strip newlines from references in mongo script
remove TODO that is finished
remove debug comments