added options.localTime

* moved the definition of the now date object to the top of the plugin to allow for overwriting with content of options.localTime
* add options.localTime (default is the current browser time)
* options.localTime allows to use the server defined js object to overwrite the time against which you are comparing the startTime object
* usecase: set the local time via serverside language into a js date object and push into jquery module. originally only the local browser time was allow

hope this makes sense.... =]