Update StickyListHeadersListView.java

fix when use `android:dividerHeight="0dp"`
```java
 Caused by: java.lang.NumberFormatException: Invalid int: ".0dip"
```
Merge pull request #200 from yaming116/patch-2

Update StickyListHeadersListView.java
Use correct default value for dividerHeight when not present in xml
Merge pull request #201 from ChristianBecker/fix/defaultDividerHeight

Use correct default value for dividerHeight when not present in xml
Fixed #187

If the header supplies illegal layout params we must fix them. Match
parent becomes wrap content. Because the standard layout params of a
framelayout are match parent this bug occurred.
Update README.md
Update README.md
Merge pull request #198 from meredrica/master

adds files that are created by android
fixes #188
Fixes #185
Made WrapperView public

This will allow developers to get the item and/or header from a view
returned by getListChildAt()
Fixes #193

Now a instance of ListView is passed as the parent parameter in
getView() instead of a WrapperView