Improve command line interface (#9)

closes #2 #3 #4 

* remove python 2 compability

* install CLI in user data path

* made preview optional

* store_true, store_false for boolean inputs

* removed dublicated 'dest' parameters

* bump version

* Update README.md

Author: lukasalexanderweber

README.md

@@ -30,12 +30,11 @@ panorama = stitcher.stitch(["img1.jpg", "img2.jpg", "img3.jpg"])
 
 ```
 
-or using the [command line
-tool](https://github.com/lukasalexanderweber/stitching/blob/main/stitching_tool.py)
+or using the command line interface ([cli](https://github.com/lukasalexanderweber/stitching/tree/main/stitching/cli/stitch.py)) which is available after installation
 
 ```bash
-python stitching_tool.py -h
-python stitching_tool.py img1.jpg img2.jpg img3.jpg
+stitch -h
+stitch img1.jpg img2.jpg img3.jpg
 ```
 
 ## Tutorial

setup.cfg

@@ -23,6 +23,9 @@ install_requires =
 include_package_data = True
 zip_safe = False
 
+[options.entry_points]
+console_scripts =
+    stitch = stitching.cli.stitch:main
+
 [options.packages.find]
-include = stitching
 exclude = tests

stitching/__init__.py

@@ -1,3 +1,3 @@
 from .stitcher import Stitcher
 
-__version__ = "0.1.0"
+__version__ = "0.2.0"