Ncbi-submit

Changed
* primer scheme and associated fields are now optional
* .fastq.gz files now work correctly for paired samples
* reports (during `ncbi_submit check`) now come out in numerical rather than alphabetical order
* submission title uses `subdir` if `plate` not provided

Added
* can now edit how fastq files are discovered for each sample in config
Changed
* fixed previously untested ability to submit paired reads

Added
* can now prepare/submit BioProject portion of XML (not yet tested with biosample/sra in the same submission, but it works alone)
Changed
* updated readme

Added
* can now submit only the samples being updated based on what appears in `spuid_endings`, with the flag `--update_only`

Changed
* readme reflects new behavior
* example files can be produced
* ftp now has subparsers for check/submit rather than --check/--submit arguments
* fixed bug filling empty bs attributes with bp accession
* handles sample names contained in other sample names - assumes name will always be separated from the rest of the filename by one of ".", "-", "_"
Added
* can compile all biosample accessions from lab's ftp submissions
* can now prepare xml for read updates alongside regular submissions
* can now resubmit xml (in case of errors in original submission)

Changed
* `--fastq_dir` not required if checking on submission
* verifies existance of any provided filenames or raises FileNotFound
* fixed primer scheme determination
* various minor syntax edits
Removed
* unused imports