CI: Use versioneer to auto update project version, release CI part 1 (#11)

* Disable linter

* Use versioneer, when the project is tagged, project version also updates

see https://github.com/python-versioneer/python-versioneer

* Remove 'requirements.txt'

Author: Zeroto521

.gitattributes

@@ -0,0 +1 @@
+flowlauncher/_version.py export-subst

.travis.yml

@@ -7,7 +7,6 @@ python:
 
 install:
     - pip install -r requirements-dev.txt
-    - pip install -r requirements.txt
 
 before_install:
     - sudo apt-get update

MANIFEST.in

@@ -4,3 +4,5 @@ include README.md
 include LICENSE
 
 include assets/*.png
+include versioneer.py
+include flowlauncher/_version.py

flowlauncher/__init__.py

@@ -1,9 +1,11 @@
 # -*- coding: utf-8 -*-
 
-from .FlowLauncher import FlowLauncher
-from .FlowLauncherAPI import FlowLauncherAPI
+from ._version import get_versions
+from .FlowLauncher import FlowLauncher  # noqa
+from .FlowLauncherAPI import FlowLauncherAPI  # noqa
 
+__version__ = get_versions()["version"]
+del get_versions
 
-__version__ = '0.1.1'
 __license__ = 'MIT'
 __short_description__ = 'Flow Launcher supports Python by JsonRPC.'