Add OTGChartProcessView's text tracking horizontal scroll.

OTGChartProcessView's text tracking horizontal scroll.

If you are using this, you set YES to this property.

//OTGChartProcessView.h
@property(nonatomic) BOOL textTrackingEnabled;

Add title font size adjust.(OTGChartProcessView and OTGChartPointView).

Change OTGanttChartViewDataSource.

These method change to optional.

- (NSInteger)ganttChartView:(OTGanttChartView *)ganttChartView numberOfPointViewsForIndexPath:(NSIndexPath *)indexPath;

- (OTGChartPointView *)ganttChartView:(OTGanttChartView *)ganttChartView chartPointViewAtIndexPath:(NSIndexPath *)indexPath pointNo:(NSInteger)pointNo;

Fix minor bugs.

Support Carthage.

・Support Carthage.

Support CocoaPods.

・Suppport CocoaPods install.
・Update README.md
・Add designation date horizontal scroll position.

First Release

・Basic gantt chart features.
・Change colors.
・Change sizes.
・Create demo application.