MicroCrypt

Added info pop-up menu.

MicroCrypt v0.1.2 binaries are signed with yubisigner
.sig files are time stamped with opentimestamps.org

The yubisigner signing certificate .pdf and accompanying .ots time stamp should proof
in an easy way that I am the author of the signed software releases.

For additional security of the source code, merkle-tree.txt in the repository is signed too
with yubisigner and additionally time stamped.

MicroCrypt

v0.1.1

Fix typo in README.md regarding device platforms