Add COMPRESS_ROOT to settings

To fix Travis test errors.
Merge pull request #31 from mbertheau/amount-available

Add amount_available property to Account
Include i18n URLs in sandbox
Include templates when installing via pip

Without this I get

warning: no files found matching '*.html' under directory 'accounts/templates/'

when doing setup.py egg_info and indeed the templates are not copied.
Merge branch 'django-1.6-transaction' into machtfit

* branch django-1.6-transaction:
  Use django-1.6 transaction methods

https://github.com/tangentlabs/django-oscar-accounts/pull/29
Merge branch 'fix-templates-installation' into machtfit

* branch fix-templates-installation:
  Include templates when installing via pip

https://github.com/tangentlabs/django-oscar-accounts/pull/32
Bump version