add gc_count, total_base_count, and gc_percent to fastq-peek.sh

[stjacqrm]

Description

Fastq-peek.sh has been modified to include GC counts, total base counts, and GC percent as was requested in exercise01. GC percent prints to stdout as requested. READ_COUNT was also updated to more closely reflect the output from fastqc results.

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

The code changes were tested using three samples; the sample provided in the sandbox, as well as two other openly available fastq files. All files were analyzed using FastQC to obtain base-level (all puns intended) quality scores. Fastq-peek.sh generated results that were concordant with FastQC.

Checklist:

• My code adheres to the repository style guide
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing tests pass locally with my changes