improvements to travis and dbench (#53)

This PR adds the `bench` script, which aims for near parity with frappe bench, it makes setting up far easier, because instead of running `./dbench -c "new-site site1.local"` you only white what you would if bench was installed on the local system (i.e. `./bench new-site site1.local`), it also adds other features as well.

.travis.yml

@@ -2,20 +2,17 @@ language: python
 python:
   - "2.7"
 env:
-  - DOCKER_COMPOSE_VERSION: 1.8.0
+  - DOCKER_COMPOSE_VERSION: 1.22.0
 
 services:
   - docker
 
 install:
-  - docker-compose build
-  - docker-compose up -d
-  - docker exec -it -u root frappe bash -c "cd /home/frappe && chown -R frappe:frappe ./*"
-  - docker exec -i frappe bash -c "cd .. && bench init frappe-bench --ignore-exist --skip-redis-config-generation && cd frappe-bench"
-  - docker exec -i frappe bash -c "mv Procfile_docker Procfile && mv sites/common_site_config_docker.json sites/common_site_config.json"
-  - docker exec -i frappe bash -c "bench new-site site1.local"
-  - docker exec -i -u root frappe bash -c "echo 127.0.0.1   site1.local >> /etc/hosts"
-  - sudo su -c 'echo 127.0.0.1   site1.local >> /etc/hosts'
+  - chmod ugo+x ./dbench
+  - ./dbench setup docker
+  - ./dbench init frappe-bench
+  - ./dbench new-site site1.local
+  - sudo ./dbench setup hosts
   - pip install --upgrade virtualenv
   - virtualenv -p python3 testenv
   - source testenv/bin/activate