Fix Issues #2, #3, & #4:

- Fix #2: When writing files, convert spaces in filenames to underscores
- Fix #3: Add compatibility for barcode files with CRLF line endings
- Fix #4: Update usage statement example to use '--id' like README

Improve FQ validation

Add option to not plot a summary

Allow mismatches; Sort reads based on index FQ file; Minor bug fixes …

…and refactoring

Port to Python

Incorporate plotting function into main script

adds link to barcode_plot.R in README

fixes links in README

adds README and sample input/output files

adds summary plotting and more fastq validation