Conda packaging

• Updated to work with Python 3
• Added unit tests to ensure basic functionality of data2passcal
• Updated list of platform specific dependencies to be installed when installing data2passcal in dev mode (see setup.py)
• Installed and tested data2passcal against Python 2.7 and Python 3.[5,6,7,8] using tox
• Formatted Python code to conform to the PEP8 style guide
• Created conda package for data2passcal that can run on Python 2.7 and Python 3.[5,6,7,8]
• Updated .gitlab-ci.yml to run a linter and unit tests for Python 2.7 and Python 3.[5,6,7,8] in GitLab CI pipeline

.gitlab-ci.yml

@@ -23,7 +23,8 @@ before_script:
 
 flake8:
   image: python:3.6
-  tags: passoft
+  tags: 
+  - passoft
   stage: static analysis
   script:
   - flake8 --ignore=E722,E712,E501 data2passcal
@@ -31,30 +32,35 @@ flake8:
 
 python2.7:
   image: python:2.7
-  tags: passoft
+  tags: 
+  - passoft
   stage: test
   script: tox -e py27
 
 python3.5:
   image: python:3.5
-  tags: passoft
+  tags: 
+  - passoft
   stage: test
   script: tox -e py35
 
 python3.6:
   image: python:3.6
-  tags: passoft
+  tags: 
+  - passoft
   stage: test
   script: tox -e py36
 
 python3.7:
   image: python:3.7
-  tags: passoft
+  tags: 
+  - passoft
   stage: test
   script: tox -e py37
 
 python3.8:
   image: python:3.8
-  tags: passoft
+  tags: 
+  - passoft
   stage: test
   script: tox -e py38