BAM tagging and support for four file formats

• Fix for handling unicode, thanks to @chapmanb and @sowmyaiyer
• Adds support for adding BAM tags to aligned fastqtransformed files. Thanks to @chapmanb.
• Adds support for UMI-only fastqtransformation.
• Adds support for paired-end target sequences.
• Adds support for detecting sample barcodes via the SB tag in the regex.
• Adds support for sample-based demultiplexing with error correction.