Merge pull request Jawbone#165 from eventualbuddha/nil-delegate-and-d…

…atasource-on-dealloc

Nil out delegate and datasource on dealloc

Fixes Jawbone#157

Fixed radius width on demo line charts

Fixes Jawbone#118 - access to bar and dot views

pod spec and read me updates

update to change log, read me, pod spec, etc

updated read me, change log, etc

Updated read me, change log and pod spec

updated pod spec

Updated pod spec