Solve issue in demo project

Add HTML and JS resources in copy bundle resources build phase of Demo
Project
Update README
Add gitignore
Remove git ignored files.
Fix bug, when start Demo - Line chart is selected, but PolarChart showing.

Add custom method for laoading chart from string.

Use this method and add Polar chart view to demo.
add comments
remove file from gitignore list
prettifying code
Update README.md

update how to load personal js files.
Since example from readme not working correctly.
Update README.md
some dev changes
Merge branch 'polar-chart'
Merge branch 'master' into develop