Explorer context entries for Console2

Registry entries that enable user to open Console2 in selected directory
by right-click menu entry in Windows File Explorer.
Setup batch file for windows

Batch file initializes environment so that batch files from this
repository can be easily used on computer with Windows OS.

It creates directory C:\opt if it doesn't exist and in it it creates
symbolic link named batch-files that is pointing to its working directory.
As a last step it merges registry entires from registry-entries.reg that
also is looked for in its working directory.