Make LR stop complaining when the 'doc' directory is missing. Also, handle missing directories explicitly specified in copy_directories as errors. Closes #142.
Make LR stop complaining when the 'doc' directory is missing.
Also, handle missing directories explicitly specified in copy_directories as errors.
Closes #142.

xiaq/luarocks,tarantool/luarocks,luarocks/luarocks,xpol/luarocks,lxbgit/luarocks,rrthomas/luarocks,starius/luarocks,lxbgit/luarocks,rrthomas/luarocks,xpol/luainstaller,xpol/luarocks,ignacio/luarocks,coderstudy/luarocks,ignacio/luarocks,xiaq/luarocks,robooo/luarocks,xpol/luavm,robooo/luarocks,usstwxy/luarocks,robooo/luarocks,starius/luarocks,tst2005/luarocks,ignacio/luarocks,lxbgit/luarocks,leafo/luarocks,coderstudy/luarocks,xpol/luavm,starius/luarocks,robooo/luarocks,rrthomas/luarocks,usstwxy/luarocks,aryajur/luarocks,aryajur/luarocks,xiaq/luarocks,usstwxy/luarocks,tarantool/luarocks,xpol/luavm,usstwxy/luarocks,xpol/luarocks,xpol/luarocks,keplerproject/luarocks,leafo/luarocks,rrthomas/luarocks,xpol/luavm,tarantool/luarocks,aryajur/luarocks,coderstudy/luarocks,xpol/luainstaller,xpol/luavm,keplerproject/luarocks,starius/luarocks,keplerproject/luarocks,aryajur/luarocks,keplerproject/luarocks,ignacio/luarocks,tst2005/luarocks,luarocks/luarocks,coderstudy/luarocks,xpol/luainstaller,luarocks/luarocks,tst2005/luarocks,xpol/luainstaller,tst2005/luarocks,leafo/luarocks,xiaq/luarocks,lxbgit/luarocks