Change version to semantic versioning as node-semver requires it
Update devDependency versions
Remove node_modules folder from repo since it will be downloaded with npm install
Move examples & img to example folder
Add npm-debug.log to gitignore
Update script references in examples
Remove globals
Remove unused global fn isString
Merge pull request #24 from franzenzenhofer/build-cleanup

Minor code & structure cleanup, build logic update