timetracker-v0.2.0

Fixes a silent bug that caused only 4 environment variables to be recorded at once, rather than 5.
The maximum number of environment variables that can be recorded is 5.

This change means the database schema has changed. Any database file produced with v0.1.0 will be incompatible with v0.2.0 and you will need to delete it and start fresh with a new database file.

Full Changelog: v0.1.0...v0.2.0

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