Fixed the screen-flickering error upon WebView load.  One line changed.
ArticleViewActivity:  fixes flickering problem.  ArticleListActivity:  fixes viewed memory problem (app now remembers which articles have been previously viewed even after full close).  Note:  memory problem is in progress; saves article title and saving article ID will be much safer and more effective
Fixed the article saving problem.  Saves viewed article IDs (not article titles) to an internal file ArticlesViewed.  TODO:  If the number of article IDs > 80, delete the first half.
Merge pull request #15 from Flauschig/testingBranch

Testing branch