Fix problems with appcompat for Android L

[raycoarana]

With the lastest appcompat library, the minimum SDK is too high. With this change, we prevent using that version and keep us on version 20+.

[raycoarana]

Meanwhile, this problem can be solve on our apps excluding the appcompat-v7 library:

compile ('com.github.chrisbanes.actionbarpulltorefresh:extra-abc:0.9.9') {
    exclude group: 'com.android.support', module: 'appcompat-v7'
}

[leonardoxh]

On README.md:

PLEASE NOTE, THIS PROJECT IS NO LONGER BEING MAINTAINED

So... The pull request will not be merged

[iamrain2008]

It helps me a lot

[yshrsmz]

JFYI https://twitter.com/chrisbanes/status/460799199941230593

This is why the library is deprecated. Basically we should use SwipeRefreshLayout;)