mocking up columnchart basic example
have working display of column chart
added some TODOs for myself
added isStacked to columnchart, removed some todo notes
Update README.md
merged changes from master
added col_chart_adv example, modified basic example, fixed error msgs in setConfig() in Chart master class
updating adv.col.chart.ex
Update README.md
added type_error to master chart. updating examples
Merge branch 'columnchart'
added nat sorting to array_values()
added axisTitlesPosition to config array
added chartLabel to master Chart error function
Merge branch 'master' into columnchart
fixed bug in type_error in master Chart
testing hack for barGroupWidth
no hack needed, fixed barGroupWidth
converted errors to type errors
Update README.md