Fix abstract class declaration causing Force Close
GerritTask: add ProgressDialog to all network communications

if UrlConnection#getContentLength() returns a real value we
show a percent... This doesn't appear to be the case for all
devices (or maybe its gerrit not providing the length)

Change-Id: I8d6806fecc0355a52c0af095c3eb07b4fa9c7765
ChangedFilesCard: Draw layout dynamically

This method is tedious but avoids ListView nested within
ScrollView which causes unviewable card content.

Also remove copyright from lib files... oops

Change-Id: Icbf9b0efd7a8c96c0bbb59fffbf5d202133d114e
Prefs: add open source credits

Patch Set 2: add missing title & summary

Change-Id: I9585597acac4546cc64e47ac199dbc5b69247887
Merge branch 'master' of github.com:JBirdVegas/external_jbirdvegas_mGerrit into progressDialog

Conflicts:
	res/values/strings.xml
	src/com/jbirdvegas/mgerrit/CardsActivity.java
	src/com/jbirdvegas/mgerrit/tasks/GerritTask.java

Change-Id: I8b2665992916344cff75996d0d05726be74ba815