Added suport for custom views

I've added support for custom views in the tab.
Now it is possible to create an adapter with custom views inside.

Sample:

	public class MyPagerAdapter extends FragmentPagerAdapter
							implements PagerSlidingTabStrip.ViewTabProvider {

		private View[] TABS;

		public MyPagerAdapter(FragmentManager fm, LayoutInflater li) {
			super(fm);
			
			TABS = new View[2]

			TABS[0] = li.inflate(R.layout.someLayout, null);
			TABS[1] = li.inflate(R.layout.someOtherLayout, null);

			/* do something with those layouts */
		}

		@Override
		public int getCount() {
			return TABS.length;
		}

		@Override
		public Fragment getItem(int position) {
			return SomeFragmentHere.newInstance(position);
		}

		public static void setTabs(View[] tabs) {
			TABS = tabs;
		}

		@Override
		public View getPageView(int position) {
			return TABS[position];
		}
	}
Maybe all instances should implement this interface.