fixed
Merge branch 'release/v0.0.1'
Add target-field to new-activity-form
added login and logout in top-nav menu
Merge branch 'master' into develop
Added abstract extensible payment methods
is-private, code and payment methods

Added is_private switch and creation of secret code, created initial
classes for abstract payment methods
Rename activity into campaign, new url design, key-code generation changed
added payment selection pre-checkout-page
irgend nen kram gemacht
each payment module can now hav its own url submodule
rename activity to campaign in transaction model
finished replacing 'activities' through 'campaigns', redirect for braintree works
sending data to the braintree server seems to work
Success message for braintree payments works
remove some unused code
braintree seems to be working fully
Add e-mail field when pledging for a project.
backup vor refactoring
refactoring of the plugin architecture