* tweak Guardfile
* remove livereload block from Guardfile
* fix Guardfile
* fix broken feature specs by requiring spec_helper
* add activities (migration, schema, model)
* add ActivityError lib file
* add activity model spec
Merge branch 'feature/activities' into develop
Test tweaks
* update/fix running scope on Tasks
* implement a few of the model specs
Merge branch 'feature/add-tasks' into develop