Reconstruction the project

1. Add a light weight framework CodeIgniter to make the code more clear and good for maintain,and the future development.
2.Old files have been keeped, view old version by index_old.php
3.'system' is the framework, 'application' for business code.
4.Reconstruct the view (application/views), controller(application/controllers). Reconstruct  the PPC_daemon to a class librarie (application/libraries)
5. for the 'getrawtransaction' methord of Peercoin client can't be used, no transaction infomation will show in the transaction view, mybe we will find another way to Implement it.

After that, It will be easy and quick to develop new features.

Todo:
1.transaction explore
2.address explore
3.JSON API
....