New changes

There are two major changes:
First, there is an option to open models locally using Spyder/Tellurium.
Second, IPython does not have to run in the background anymore. However, there might be a problem on running the script on Linux/Unix based system. Right now I have used CREATE_NEW_CONSOLE (which, as far as I know, only works in Windows) which separates the environment where IPython is running. Otherwise, IPython runs on the same console as app.py, which is undesirable. If you know a way to circumvent this in Linux/Unix, please do so.