getViewPort added

I've added the getViewPort fuction
Show/Hide Graph labels

Dynamically show and hide vertical and horizontal labels
Merge pull request #129 from bobans/master

Show/Hide Graph labels
Add the Ability to set upper or lower bounds

The code currently only allows you to set both upper and lower, this modification will allow user to set just a lower bound or just an upper bound depending on there needs.
Merge pull request #131 from kamaltmo/patch-1

Add the Ability to set upper or lower bounds to the Y-Axis
drawDataPoints in LineView did not draw point on the last value and on single value
Add GridStyle to support Horizontal, Vertical and Both direction grid style for GraphView
function name changed

the getViewPort function is renamed to  getViewportSize
Merge pull request #121 from mHealthDroid/master

getViewPort function added
Merge pull request #134 from MarcDahlem/master

drawDataPoints in LineView did not draw points
better code
refs #118 no calc error if width/height == 0
Merge pull request #136 from moallemi/master

Add GridStyle to support Horizontal, Vertical and Both direction grid lines for GraphView
Merge branch 'master' of https://github.com/jjoe64/GraphView
gradle module for Android Studio
removed doc in master branch
doc
Merge branch 'master' of https://github.com/jjoe64/GraphView
refs #148 check values order
typo