Fix current directory issue when called from a different drive
minicoin fails to run if current directory is on a different drive than the minicoin install drive.
The cause of the issue is that minicoin.cmd uses 'cd' to change to its install directory. A naked 'cd' does not change drive. 'pushd' or 'cd /D' also changes drive.
This patch fixes the problem by using pushd instead of cd to change the current directory.
Fixes #37 (closed)