French layout support for HID - PowerSploit

- removed the LANG="C" in start-rev-* scripts to allow dynamic LANG selection
- added the LANG=$lang in rev-met-*.sh scripts to "pass the lang" to the rev-met*.py
- fixed some typo / bad comments in keyseed.py
- modified the *.php scripts to retreive the browser's default language and pass it
as LANG var to the HID scripts (only french fr_FR or defaults to C)
- updated the htdocs.tar.gz (this is redondant with the *.php scripts added to the
repository)