Fix travis-builds and tests in general (#295)

* add explicit location of capabilities.json for travis
* pass on env variables in tox builds
* drop support for python 3.3 and remove python3.3 from supported versions list

.travis.yml

@@ -7,12 +7,13 @@ addons:
   apt:
     packages:
       - graphviz
+env:
+  global:
+    - ESCPOS_CAPABILITIES_FILE=/home/travis/build/python-escpos/python-escpos/capabilities-data/dist/capabilities.json
 matrix:
   include:
     - python: 2.7
       env: TOXENV=py27
-    - python: 3.3
-      env: TOXENV=py33
     - python: 3.4
       env: TOXENV=py34
     - python: 3.5
@@ -21,6 +22,8 @@ matrix:
       env: TOXENV=py36
     - python: 3.6-dev
       env: TOXENV=py36
+    - python: 3.7-dev
+      env: TOXENV=py37
     - python: nightly
       env: TOXENV=py37
     - python: pypy
@@ -35,6 +38,7 @@ matrix:
       env: TOXENV=flake8
   allow_failures:
     - python: 3.6-dev
+    - python: 3.7-dev
     - python: nightly
     - python: pypy3
 before_install:
@@ -59,4 +63,4 @@ deploy:
       tags: true
       repo: python-escpos/python-escpos
       branch: master
-      condition: $TRAVIS_PYTHON_VERSION = "3.5"
+      condition: $TRAVIS_PYTHON_VERSION = "3.6"

setup.py

@@ -96,7 +96,6 @@ setup(
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',

tox.ini

@@ -13,6 +13,7 @@ deps = nose
        hypothesis!=3.56.9
        viivakoodi
 commands = py.test --cov escpos
+passenv = ESCPOS_CAPABILITIES_PICKLE_DIR ESCPOS_CAPABILITIES_FILE CI TRAVIS TRAVIS_* APPVEYOR APPVEYOR_* CODECOV_*
 
 [testenv:docs]
 basepython = python