add in --help argument to grinder.rb. Also add in --browser argument for consistency.
add in --help argument to grinder.rb. Also add in --browser argument for consistency.

zhuyue1314/grinder,mayconvitali/grinder,syjzwjj/grinder,sigma-random/grinder,sigma-random/grinder,liorvh/grinder,liorvh/grinder,liorvh/grinder,stephenfewer/grinder,un-fmunozs/grinder,zhuyue1314/grinder,un-fmunozs/grinder,sigma-random/grinder,un-fmunozs/grinder,stephenfewer/grinder,liorvh/grinder,mayconvitali/grinder,syjzwjj/grinder,stephenfewer/grinder,syjzwjj/grinder,zhuyue1314/grinder,sigma-random/grinder,stephenfewer/grinder,syjzwjj/grinder,mayconvitali/grinder,liorvh/grinder,syjzwjj/grinder,stephenfewer/grinder,un-fmunozs/grinder,sigma-random/grinder,zhuyue1314/grinder,mayconvitali/grinder,mayconvitali/grinder,zhuyue1314/grinder,un-fmunozs/grinder