Do not create new chartWrapper every time.

Creating new chartWrapper on every update causes major memory leaks, that are a real problem if you update graphs every second.

Signed-off-by: matematik7 <domen.ipavec@z-v.si>
Keep ChartWrapper but update user-changeable properties if chartWrapper exists.
Merge pull request #1 from Balrog30/gh-pages

Keep ChartWrapper but update user-changeable properties if chartWrapper ...
Merge pull request #94 from matematik7/gh-pages

Do not create new chartWrapper on every update.
Add package.json for npm
Merge branch 'gh-pages'