Change license of envml and envml.cmd scripts from GPLv3+ to GPLv2+.
Align this way all files from the Modules project under the GPLv2+
license.
Consent has been obtained from the copyright holders (I and @jraphanel)
to perform such move. Consent from Jacques Raphanel was collected by
email.
Related to #389
Provide a dedicated batch file to provide similar behavior of envml bash
script but for CMD Windows shell. Update existing envml bash script to
provide same behavior for cmd and sh file (split argument over ';'
character, in addition to '&' character).
