first draft of speech and council events ui
speech models added; admin prototyped
refined ui for speeches and sittings
django release fixed to 1.4.5, for compatibility reasons (1.5.x is not compatible at the moment
resolved conflict after merge from dev-senigallia
speech app detached,as will not be used
ADMIN_MEDIA_PREFIX removed as it's deprecated
speech removed from urls; speeches for a politician computed through acts.Speech
method git_display_status causing recursive calls removed, as is part of the pre-defined django methods to display choices
refer to the "new" Speech
Merge branch 'dev' of https://github.com/openpolis/open_municipio into dev-senigallia

Conflicts:
	open_municipio/acts/admin.py
	open_municipio/data_import/votations/lib.py
	open_municipio/people/views.py
	open_municipio/settings.py
	open_municipio/urls.py
speech ui templates and views adapted to recent modifications to
the model (in particular Sitting, SittingItem, Speech)

Merge branch 'speech_ui' into dev-senigallia

Conflicts:
	open_municipio/people/views.py
	open_municipio/settings.py
	open_municipio/speech/admin.py
	open_municipio/speech/models.py
	open_municipio/speech/urls.py
	open_municipio/speech/views.py
	open_municipio/templates/people/politician_detail.html
speech ui: new views and templates + refactor

modified also TimeWidget and TimeField