Create Make rule to verify data format

[erictleung]

Create a Makefile rule that will double check the format of the data.

Data Format Specifications

• For now, only take paired-end read samples
• Check that files are .fastq or .fastq.gz
• Check naming scheme of files

User Story

As a user, I want to be able to be able to type the following

make verify

so that I can have a check that at least loading data won't be a problem.