Move include file into the correct location

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Add missing #include's for Linux

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Update license headers

The credit goes to: mvn license:update-file-header

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>