AdapterRemoval v2.3.4

This release adds a new couple of command-line options for handling non-ACGTN
bases in FASTQ data and back-ports a few minor fixes from the development
branch.

Added

• Added support for converting Uracils (U) in input data to Thymine (T) via the
  --convert-uracils flag.
• Added support for replacing IUPAC-encoded degenerate bases with Ns via the
  --mask-degenerate-bases flag.
• Added DESTDIR support to make install.

Fixed

• Improved progress timer accuracy, so updates occur closer to every 1M reads.

Changed

• Minor improvements to --help text and documentation.