Update package versions, add dependency to Python.

The pip package was registered but not uploaded somehow. Seems to be
working now. Dependence on jsonschema was added.

package.json

@@ -1,6 +1,6 @@
 {
     "name": "speriment",
-    "version": "0.1.0",
+    "version": "0.2.0",
     "description": "Making experiments easier to express",
     "keywords": ["experiment", "Mechanical Turk", "linguistics", "psychology", "social science"],
     "bugs": "issues",

setup.py

@@ -1,7 +1,7 @@
 from setuptools import setup
 
 setup(name='speriment',
-      version='0.1',
+      version='0.2.1',
       description='Making experiments easier to express',
       url='http://github.com/presleyp/speriment',
       author='Presley Pizzo',
@@ -14,5 +14,6 @@
       packages=['speriment'],
       package_data={'speriment': ['sperimentschema.json']},
       scripts=['bin/speriment-output'],
+      install_requires=['jsonschema'],
       include_package_data=True,
       zip_safe=False)