move number generation in separate method
add Segment control to select Bezier or straight curve.
fix position of segment for iPhone 4
cleanup
Merge pull request #76 from skywinder/sampleImprovments

Add segment to select Bezier or straight line on sample app
Fixed issue #73 and labels Y axis height

- The issue with bezier curves should now be totally fixed.
- The height of the labels on the Y-axis has been increased to make
sure the could display all the text.
Merge pull request #78 from Boris-Em/pr/76

Fixed issue #73 and labels Y axis height
update travis script to avoid "exited with 134"
Auto-update storryboard from Xcode 6.1 + add refresh graph instantly, when press on segments
Fix wrong presentation of years in code exmple (when you click + stepper years starts from 0) now everything works as expected. + rename arrays, accoding Apple guidelines (variables should start from lowercase letter)
Merge branch 'travis-fix' into improve-Example
Merge branch 'travis-fix'
Merge branch 'improve-Example'