Add tox, coverage, flake8 and Travis config.

.travis.yml

@@ -0,0 +1,34 @@
+sudo: false
+language: python
+
+cache: pip
+
+# Tox cannot install pythons, so we set 3.5 as default, use 3.4 already
+# available in container and then include 3.6 in matrix.
+python:
+  - 3.5
+
+env:
+  - TOXENV=py34
+  - TOXENV=py35
+
+matrix:
+  include:
+    - python: 3.6
+      env: TOXENV=py36
+    - python: 3.4  # i.e. skip installing 3.5
+      env: TOXENV=lint
+    - python: 3.4
+      env: TOXENV=coverage
+
+install:
+  - pip install tox
+
+script:
+  - tox
+
+after_success:
+  - if [[ $TOXENV =~ coverage ]]; then
+    pip install --quiet python-coveralls;
+    coveralls --ignore-errors;
+    fi

setup.cfg

@@ -0,0 +1,19 @@
+[flake8]
+exclude = .eggs,.tox,.git
+max-line-length = 100
+max-complexity = 14
+
+[coverage:run]
+source = telethon
+#branch = True
+parallel = True
+
+[coverage:report]
+ignore_errors = True
+skip_covered = True
+show_missing = True
+
+# Regex expressions for lines excluded from report
+exclude_lines =
+    pragma: no cover
+    if __name__ == .__main__.:

tox.ini

@@ -0,0 +1,26 @@
+[tox]
+envlist = py34,py35,py36
+
+[testenv]
+recreate = True
+commands = coverage run setup.py test
+install_command =
+    pip install {opts} {packages}
+deps = coverage
+
+[testenv:coverage]
+basepython = python3.4
+skip_install = true
+commands =
+    coverage combine
+    coverage report
+deps =
+    coverage
+
+[testenv:lint]
+basepython = python3.4
+skip_install = true
+commands =
+    flake8
+deps =
+    flake8