Added long opt parsing, now understands -- and parses non-option elements into cmdarg_argv. Docs updated.

tests/test_dashdash.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/bash4
+
+source $(dirname ${BASH_SOURCE[0]})/../cmdarg.sh
+
+function shunittest_dashdash
+{
+    set -x
+    cmdarg_purge
+    cmdarg_parse -- lolzors something
+    [[ "${cmdarg_argv[0]}" == "lolzors" ]] || return 1
+    [[ "${cmdarg_argv[1]}" == "something" ]] || return 1
+}
+
+function shunittest_missing_dashdash
+{
+    set -x
+    cmdarg_purge
+    ( cmdarg_parse --lolzors ) || return 0
+    return 1
+}
+
+function shunittest_withbool_missing_dashdash
+{
+    set -x
+    cmdarg_purge
+    cmdarg 'x' 'xray' 'thingy for xray'
+    ( cmdarg_parse -x lolzors ) || return 0
+    cmdarg_parse -x -- lolzors
+}
+
+function shunittest_withopt_with_dashdash
+{
+    set -x
+    cmdarg_purge
+    cmdarg 'x:' 'xray' 'thingy for xray'
+    ( cmdarg_parse -x -- lolzors ) || return 0
+}