Merge pull request #5 from j4velin/master

getDataSize() implemented for all charts
Bug Fixing
- fixed Issue #7
- fixed bug in ValueLineChart (NegativeOffset wasn't updated)
Merge branch 'master' of https://github.com/blackfizz/EazeGraph
updated README
updated README
added support for Android API Level 9 and higher
Update README.md
Update README.md
documented complete sourcecode
refactored the code and fixed some minor bugs
Merge branch 'master' of https://github.com/blackfizz/EazeGraph
updated README
Merge remote-tracking branch 'upstream/master'

Conflicts:
	EazeGraphLibrary/EazeGraphLibrary.iml
	EazeGraphLibrary/build.gradle
	README.md
	settings.gradle
	showcase/build.gradle
	showcase/proguard-rules.pro
	showcase/showcase.iml
	showcase/src/main/AndroidManifest.xml
	showcase/src/main/java/org/eazegraph/showcase/ChartActivity.java
	showcase/src/main/java/org/eazegraph/showcase/NavigationDrawerFragment.java
	showcase/src/main/java/org/eazegraph/showcase/fragments/BarChartFragment.java
	showcase/src/main/java/org/eazegraph/showcase/fragments/ChartFragment.java
	showcase/src/main/java/org/eazegraph/showcase/fragments/CubicValueLineChartFragment.java
	showcase/src/main/java/org/eazegraph/showcase/fragments/PieChartFragment.java
	showcase/src/main/java/org/eazegraph/showcase/fragments/StackedBarChartFragment.java
	showcase/src/main/java/org/eazegraph/showcase/fragments/ValueLineChartFragment.java
	showcase/src/main/res/drawable-hdpi/drawer_shadow.9.png
	showcase/src/main/res/drawable-hdpi/ic_action_refresh.png
	showcase/src/main/res/drawable-hdpi/ic_drawer.png
	showcase/src/main/res/drawable-mdpi/drawer_shadow.9.png
	showcase/src/main/res/drawable-mdpi/ic_action_refresh.png
	showcase/src/main/res/drawable-mdpi/ic_drawer.png
	showcase/src/main/res/drawable-xhdpi/drawer_shadow.9.png
	showcase/src/main/res/drawable-xhdpi/ic_action_refresh.png
	showcase/src/main/res/drawable-xhdpi/ic_drawer.png
	showcase/src/main/res/drawable-xxhdpi/drawer_shadow.9.png
	showcase/src/main/res/drawable-xxhdpi/ic_action_refresh.png
	showcase/src/main/res/drawable-xxhdpi/ic_drawer.png
	showcase/src/main/res/layout/activity_chart.xml
	showcase/src/main/res/layout/fragment_bar_chart.xml
	showcase/src/main/res/layout/fragment_cubic_value_line_chart.xml
	showcase/src/main/res/layout/fragment_navigation_drawer.xml
	showcase/src/main/res/layout/fragment_pie_chart.xml
	showcase/src/main/res/layout/fragment_stacked_bar_chart.xml
	showcase/src/main/res/layout/fragment_value_line_chart.xml
	showcase/src/main/res/menu/chart.xml
	showcase/src/main/res/menu/global.xml
	showcase/src/main/res/menu/main.xml
	showcase/src/main/res/values-w820dp/dimens.xml
	showcase/src/main/res/values/dimens.xml
	showcase/src/main/res/values/strings.xml
	showcase/src/main/res/values/styles.xml
	src/main/java/org/eazegraph/lib/charts/BarChart.java
	src/main/java/org/eazegraph/lib/charts/BaseChart.java
	src/main/java/org/eazegraph/lib/charts/StackedBarChart.java