bspm 0.4.0

• New function available_sys() returns a matrix of available packages with
  "Package", "Version", and "Repository" (#47 addressing #41).
• Honor type option, set by default to "both", which means 'use binary
  if available and current, otherwise try source' (#48 addressing #46).
  As a consequence, the option bspm.always.install.deps has been removed.

bspm 0.3.10

• Check backend availability on enable(), and trigger a warning if the
  service is required but not found. This check can be disabled by setting
  options(bspm.backend.check=FALSE) (#40).

bspm 0.3.9

• Force sudo unconditionally also with autodetection (#27, #28).
• Call update_cache in DNF install transactions (#29).
• Add ALPM backend (#35 addressing #34).
• Fix repeated installation issue in APT backend (#36).

bspm 0.3.8

• Fix spurious error with options(bspm.always.install.deps=TRUE) (#25).
• Ensure that options(bspm.sudo=TRUE) forces sudo unconditionally (#28).
• Add new options(bspm.sudo.autodetect=TRUE) (not set by default) to enable
  passwordless sudo autodetection on every call (#27).

bspm 0.3.7

• Fix spurious error with options(bspm.always.install.deps=TRUE) (#24).

bspm 0.3.6

• Make APT call fail if there are unmet dependencies (#20).
• Add new options(bspm.always.install.deps=TRUE) (not set by default) to
  always try to install recursive hard dependencies of packages from system
  repositories even if the requested package is not available (#14, #23).
• Add a note about SELinux (#19).

bspm 0.3.5

• Fix noise when busctl is installed but there's no system bus (docker) (#12).
• Workaround issue with file permissions under /tmp (#13).
• Fix compatibility with Python 3.6 (#16 addressing #15).
• Workaround PATH for old versions of APT/dpkg (#17 addressing #15).
• Prioritize options(bspm.sudo=TRUE) over DBus calls (as part of #16), so that
  any DBus error or incompatibility can be at least bypassed with sudo.

bspm 0.3.4

• Fix installation issue reported by CRAN on Solaris.

bspm 0.3.3

• Cosmetic changes suggested by CRAN.
• Small configure fix.

bspm 0.3.2

• Implement functions to discover new prefixes dynamically (#3).
• Fall back to sudo if no root permissions nor D-Bus service are available.
• More documentation, some examples, and testing.