Update installation to use PyPI for json-schema package

Signed-off-by: Rob Herring <[email protected]>

README.md

@@ -105,21 +105,24 @@ fit for use.
 The project and its dependencies can be installed with pip directly from git:
 
 ```
-pip3 install git+https://github.com/robherring/yaml-bindings.git@master --process-dependency-links
+pip3 install git+https://github.com/robherring/yaml-bindings.git@master
 ```
 
 All executables will be installed. Ensure ~/.local/bin is in the PATH.
 
 
-For development, clone the git repository manually and run setup.py script:
+For development, clone the git repository manually and run pip on local tree::
 
 ```
 git clone https://github.com/robherring/yaml-bindings.git
 cd yaml-bindings
-./setup.py develop
+pip3 install -e .
 ```
 
 ## Dependencies
+Note: The above installation instructions handle all of the dependencies
+automatically.
+
 This code depends on Python 3 with the ruamel.yaml, rfc3987, and jsonschema
 libraries.
 

setup.py

@@ -41,14 +41,10 @@
 
     install_requires=[
         'ruamel.yaml>0.15.69',
-        'jsonschema>2.6.0',
+        'jsonschema==3.0.0a3',
         'rfc3987',
     ],
 
-    dependency_links=[
-        'git+https://github.com/Julian/jsonschema.git#egg=jsonschema-2.6.1',
-    ],
-
     classifiers=(
         "Programming Language :: Python :: 3",
         "License :: OSI Approved :: BSD License",