Fix bad option

"frequency" instead of "freq" to respect the usage message.

Signed-off-by: Mohamad Gebai <mohamad.gebai@polymtl.ca>
Fix usage message

Wk-pulse does not require a command

Signed-off-by: Mohamad Gebai <mohamad.gebai@polymtl.ca>
Merge pull request #3 from mogeb/local

Fix bad option