v0.8.1: development release with bugfixes

This is a bug-fix release, fixing some significant bugs which found their way into the 0.8.0 release.

• Fixed crash on service load error.
• Fixed an unchecked allocation leading to possible unexpected termination.
• Fixed a slow memory leak (in the bundled Dasynq library).
• Fixed --help option for "dinitcheck" not working.
• Fixed badly formatted error message from process launch failure.
• Fixed issue where log file would not always be flushed on exit.
• Fixed "dinitcheck" crashing if service description could not be found.