update vagrant install script to omit redis, and use the new split requirements files
update vagrant install script to omit redis, and use the new split requirements files

jmcarp/wagtaildemo,ThibWeb/wagtaildemo,gasman/wagtaildemo,torchbox/wagtailapidemo,jalourenco/wagtaildemo,dudunato/ywam-cerrado,jalourenco/wagtaildemo,torchbox/wagtaildemo,marceloboth/wagtail-cms,achubb-dinosaur/wagtail-test,jmcarp/wagtaildemo,torchbox/wagtailapidemo,dudunato/ywam-cerrado,achubb-dinosaur/wagtail-test,torchbox/wagtailapidemo,jmcarp/wagtaildemo,ThibWeb/wagtaildemo,jalourenco/wagtaildemo,lincolnloop/wagtaildemo,gasman/wagtaildemo,kaedroho/wagtaildemo,torchbox/wagtaildemo,dudunato/ywam-cerrado,dudunato/ywam-cerrado,lincolnloop/wagtaildemo,torchbox/wagtaildemo,marceloboth/wagtail-cms,achubb-dinosaur/wagtail-test,ThibWeb/wagtaildemo,lincolnloop/wagtaildemo,achubb/wagtaildemo-heroku,gasman/wagtaildemo,torchbox/wagtaildemo,achubb/wagtaildemo-heroku,ThibWeb/wagtaildemo,gasman/wagtaildemo,kaedroho/wagtaildemo,jmcarp/wagtaildemo,achubb/wagtaildemo-heroku,kaedroho/wagtaildemo,torchbox/wagtailapidemo,lincolnloop/wagtaildemo,marceloboth/wagtail-cms,kaedroho/wagtaildemo