timetracker-v0.3.3

This release adjusts the output text from the "timetracker-print" program, with clearer "Summary" text headings, and skipping summary weekdays for days where no activity is recorded.

The packaging and installation documentation has been improved and updated.

Full Changelog: v0.3.2...v0.3.3

The pre-built binaries were built with the provided Dockerfile_centos7 file and are intended to run on CentOS 7.x.