fix(doc-extractor): give decent error if projectPath is missing
chore(package.json): bump version to 0.1.0 and update dgeni dependency

Moving to v0.1.x should improve npm install issues, because 0.0.x -> 0.0.x+1
is deemed a breaking change.
feat(example-generation): generate examples for multiple deployments

Also, refactors the example processing into its own package, called examples.
You can use this package as a mixin on top of other packages. See the
README
chore(version): bump to 0.2.0

Breaking Change: The examples processors have moved out of the ngdoc
package and into their own package called examples.
fix(example-generation): commonFiles should get scripts from the 'scripts' object
chore(version): bump to 0.2.1