init
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Add Graph View

draw the low level line chart use some classes from the Internet
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Revert a737b0b..39e1f66

This rolls back to commit a737b0b2b3aa23c3fbfa7d8746006daf428c627d.
Merge branch 'HZBStatsView'

This reverts commit 39e1f6615775763c3cc64a3ea980b215a4dd689c.