changed setInfoText argument from String to CharSequence to allow more freedom. eg: use a Spannable as message

Author: PierfrancescoSoffritti

materialintro/src/main/java/co/mobiwise/materialintro/view/MaterialIntroView.java

@@ -561,7 +561,7 @@ private void setColorTextViewInfo(int colorTextViewInfo) {
         textViewInfo.setTextColor(this.colorTextViewInfo);
     }
 
-    private void setTextViewInfo(String textViewInfo) {
+    private void setTextViewInfo(CharSequence textViewInfo) {
         this.textViewInfo.setText(textViewInfo);
     }
 
@@ -664,7 +664,7 @@ public Builder setTextColor(int textColor) {
             return this;
         }
 
-        public Builder setInfoText(String infoText) {
+        public Builder setInfoText(CharSequence infoText) {
             materialIntroView.enableInfoDialog(true);
             materialIntroView.setTextViewInfo(infoText);
             return this;