modified schema, added dummyadmin module

dummyadmin module from stackoverflow via anonymous
add currencies
added django-registration-templates submodule
modifications to use django-registration-templates
add Person and Currency fixtures
use render instead of render_to_request

Fixes logged in text.
Also removed some requirements
using other version of django-registration compatible with custom user models, changes to assign the logged in user to the proposal form and changed view functions to class based views
minor change: set Proposal title field unique
add Pledge creation url, view, form and template
add person transactions and balance views and other modifications
* remove dummyadmin app as isn't current working with custom user models
* add superuser to initial data
* add proposal and pledges to initial data
* add person view with transactions and balance
* add create transaction
replazed django-registration-templates by django-registration-defaults
refactor dir layout to separate application and project
add egg= to requirements.txt
move thresh{,_project} to src directory
fix include template path
add logging configuration to console in settings.py
changes related create/update pledge
* add PledgeUpdateView
* add PledgeCreateView dispatch method
* add validation of the amount needed to reach threshold in PledgeForm clean method
* substitute "backed" name methods by "reach_threshold" in models and forms
* change success_url by get_success_url in ProposalCreateView
* add unicode method to models
* use thresh logger in getLogger
fix pledge validation
fix proposal percent backed and remove pledge link when it's backed
fix proposal pledges amount