hide src/* files not necessary for users

src/.singularity_modules/gatk/4.0.8.1/build.sh

src/.singularity_modules/gatk/4.0.8.1/gatk

src/.singularity_modules/gatk/4.0.8.1/gatk.def

src/.singularity_modules/hisat2/2.0.0/build.sh

src/.singularity_modules/hisat2/2.0.0/hisat2

src/.singularity_modules/hisat2/2.0.0/hisat2.def

src/.singularity_modules/hisat2/2.1.0/build.sh

src/.singularity_modules/hisat2/2.1.0/hisat2

src/.singularity_modules/hisat2/2.1.0/hisat2.def

src/.singularity_modules/htseq/0.11.2/build.sh

src/.singularity_modules/htseq/0.11.2/htseq

src/.singularity_modules/htseq/0.11.2/htseq.def

src/.singularity_modules/htseq/0.8.0/build.sh

src/.singularity_modules/htseq/0.8.0/htseq

src/.singularity_modules/htseq/0.8.0/htseq.def

src/.singularity_modules/kallisto/0.43.1/build.sh

src/.singularity_modules/kallisto/0.43.1/kallisto

src/.singularity_modules/kallisto/0.43.1/kallisto.def

src/.singularity_modules/kallisto/0.44.0/build.sh

src/.singularity_modules/kallisto/0.44.0/kallisto