Updated test files and test_scripts.py
fixed tests/test_scripts.py for scripts/fastq-to-fasta.py
Updated doc/scripts.txt & ChangeLog for descriptions of fastq-to-fasta.py
Merge pull request #436 from ged-lab/fix/fastq-to-fasta_toscripts

Reopened pull request from #435 for fix/fastq-to-fasta_toscripts