fixing optparse to behave nicely in the presence of hashbangs -- stop parsing after the first non-option argument, and pass the rest along -- and adding an OptionParser test.

test/test_option_parser.coffee

@@ -0,0 +1,20 @@
+# Ensure that the OptionParser handles arguments correctly.
+
+{OptionParser}: require './../lib/optparse'
+
+opt: new OptionParser [
+  ['-r', '--required [DIR]',  'desc required']
+  ['-o', '--optional',        'desc optional']
+]
+
+result: opt.parse ['one', 'two', 'three', '-r', 'dir']
+
+ok result.arguments.length is 5
+ok result.arguments[3] is '-r'
+
+result: opt.parse ['--optional', '-r', 'folder', 'one', 'two']
+
+ok result.optional is true
+ok result.required is 'folder'
+ok result.arguments.join(' ') is 'folder one two'
+