Improving Evaluation logic in client

	modified:   res/layout/activity_article_evaluation.xml
	modified:   res/values/strings.xml
	modified:   src/br/ufrn/dimap/pubshare/activity/PubnotesActivity.java
	modified:   src/br/ufrn/dimap/pubshare/evaluation/ArticleDetailActivity.java
	modified:   src/br/ufrn/dimap/pubshare/evaluation/ArticleEvaluationActivity.java
	modified:   src/br/ufrn/dimap/pubshare/evaluation/EvaluationListAdapter.java
	modified:   src/br/ufrn/dimap/pubshare/util/Constants.java