0.2.0

WARNING: Do not use this release as the libtool versioning is broken, use the 0.2.1 release instead.

• API:
  • Add src_clone() function to clone a SRC_STATE* handle
• Cleanup Autotools build system.
• Require C99 compiler
• Move sndfile-resample to sndfile-tools package
• Add missing src_get_channels() export to windows def file
• Fix macOS compile errors and modernize audio api on that platform
• Add Octave scripts to generate filter coefficients
• Fix two potential undefined behaviours
• Fix a buffer out-of-bounds read error in src/src_sinc.c
• Improve multichan_throughput_test
• Replace buggy implementation of Duffs device by regular loop
• CMake:
  • Fix CMake generated shared library ABI compliance with Autotools build
• Documentation:
  • Move site to new URL: http://libsndfile.github.io/libsamplerate/
  • Convert documentation pages from HTML to Markdown
  • Use GitHub's Jekyll static site generator to generate static HTML pages
    for site

Note for Autotools users: Please note that the "Source code (zip)" or "Source code (tar.gz)" downloads require you to have the autotools toolchain (autoconf, automake and libtool) installed. If you don't want to install it (or don't know what this means), you should probably download the libsamplerate-*.tar.bz2 asset instead.