Update help output and readme

Author: danielstjules

README.md

@@ -67,7 +67,7 @@ Options:
   -V, --version                      output the version number
   -t, --threshold <number>           number of nodes (default: 30)
   -m, --min-instances <number>       min instances for a match (default: 2)
-  -c, --config                       path to config file (default: .jsinspectrc)
+  -c, --config [config]              path to config file (default: .jsinspectrc)
   -r, --reporter [default|json|pmd]  specify the reporter to use
   -I, --no-identifiers               do not match identifiers
   -L, --no-literals                  do not match literals

bin/jsinspect

@@ -22,7 +22,7 @@ program
   .option('-m, --min-instances <number>',
     'min instances for a match (default: 2)', parseInt)
   .option('-c, --config [config]',
-    'path to config file [.jsinspectrc]', '.jsinspectrc')
+    'path to config file (default: .jsinspectrc)', '.jsinspectrc')
   .option('-r, --reporter [default|json|pmd]',
     'specify the reporter to use')
   .option('-I, --no-identifiers', 'do not match identifiers')