Minor fixes

Fixes for WMI based communications
Fixes for battery controls
Fixes for some segfaults and error handling

v2.4.2

Compatibility changes to fix man page and includes in some installations

v2.4.1

Minor fixes submitted for help2man improvements and a signed comparison.

debian/2.4.0-1

Debian release 2.4.0-1

v2.4.0

This release mostly focuses on bringing libsmbios into the modern Linux world.

• Convert all python2 -> python3
• Drop libsmbios C++ library
• Introduce support for WMI SMM API provided by Linux kernel 4.15+: https://github.com/torvalds/linux/blob/master/drivers/platform/x86/dell-smbios-wmi.c
• Add proper support for SMBIOS 3.0 tables
• Fix many many crashers
• Clean up long standing coverity errors

The project now uses Travis CI to run unit tests under Debian testing deb builds and CentOS7 rpm builds.
Artifacts are also archived from Travis at release time.

bumping version to 2.3.3

v2.3.3

Update version in configure.ac to match reality