Merge pull request #2 from Tieske/master

LuaCov update
Add #! to improve detection as a command-line Lua script
Move init.lua back to luacov.lua; remove metatable trick.
Move wrapper scripts to a separate directory, rename main script back to luacov
Fix rockspec
Doc updates from gh-pages branch
Restore the metatable trick for command-line use
Add download URLs, more info
update Makefile
fix Makefile
Make sure the script is executable
rockspec updates
Deploy the correct file.
Expose init()
Fix exclusions list
Make option parsing more flexible and more compliant with current Unix conventions.
Fix use of module function to comply with the crappy "M" policy... :-(
clean up global, return all values on error
Fix indentation and use of statsfile
Report error properly