(edebug-storing-offsets): Move indent and debug to inside the macro.

(edebug-storing-offsets): Move indent and debug to inside the macro.
(edebug-read-storing-offsets): Simplify.
(edebug-read-quote, edebug-read-function): Place the start-position correctly.
(edebug-read-backquote-new): Remove.
(edebug-read-backquote-level): New var to replace it.
(edebug-read-backquote): Increment it.  Don't store offsets one extra time.
(edebug-read-comma): Decrement it.  Read the comma as a plain
symbol if outside of any new-style backquote.
(edebug-read-list): Use edebug-read-backquote-level.
Don't call edebug-read-backquote directly.  This way the extra
offsets store is done exactly when it's needed.
(edebug-read-vector): Use push.
(defmacro): Add support for the `declare' thingy.