2019.06.07
+ added support for Markdown documents

2019.05.27
+ refactored code
* changed section in config file to: Windows, Linux, Darwin etc.
+ added config option "server_command" (Unix)

2019.05.26
+ support for Linux (and other Unixes)
+ added command "Open browser window"
- fixed support for pictures/css on pages

2019.05.23
Initial version
