Add drone and tox config files

.drone.yml

@@ -0,0 +1,9 @@
+image: python:all
+env:
+  - POSTGRESQL_URI=postgresql://postgres@127.0.0.1:5432/
+  - MYSQL_URI=mysql://root@127.0.0.1:3306/
+script:
+  - pip install tox
+  - tox -e "{py27,py33,py34,py35}-{sqlite,postgresql}" --skip-missing-interpreters
+services:
+  - postgres

tox.ini

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+[tox]
+envlist = {py27,py33,py34,py35}-{sqlite,postgresql,mysql},pypy-{sqlite,postgresql}
+
+[testenv]
+commands = {envpython} setup.py test
+deps =
+    {py27,py33,py34,py35}-postgresql: psycopg2 >= 2.5
+    pypy-postgresql: psycopg2cffi >= 2.5
+    mysql: MySQL-python
+setenv =
+    sqlite: TRYTOND_DATABASE_URI={env:SQLITE_URI:sqlite://}
+    postgresql: TRYTOND_DATABASE_URI={env:POSTGRESQL_URI:postgresql://}
+    mysql: TRYTOND_DATABASE_URI={env:MYSQL_URI:mysql://}
+    sqlite: DB_NAME={env:SQLITE_NAME::memory:}
+    postgresql: DB_NAME={env:POSTGRESQL_NAME:test}
+    mysql: DB_NAME={env:MYSQL_NAME:test}
+install_command = pip install --pre --find-links https://trydevpi.tryton.org/ {opts} {packages}