Merge pull request #39 from FreekDB/master

ViewerFrame: fixed Checkstyle issue and typo
Merge pull request #40 from FreekDB/master

ReportUnit: moved getComparatorV2 inner class to separate class
ChartUnit.java: 
Added a new renderer XYAreaRenderer – so that there are no white spaces
between displayed data items.
Added createAreaRenderer(...) method with configuration for
XYAreaRenderer. 
Annoted createBarRenderer(...) method with tag
@SuppressWarnings("unused").
AboutFrame.java now extends JDialog instead of JFrame. 
ChooseMetricsForm.java now extends JDialog instead of JFrame. 
Updated corresponding calls to these classes in ViewerFrame.java.
Removed redundant .readLine() statements from ReportReader.java.
Processed feedback and comments from Thang.
Processing feedback of the BioAssist programmer’s meeting on 12 July. 
Updated Installation and User Guide to updated design and features.
ReportUnit.java:
Removed getComparator method. 
Main.java and ViewerFrame.java now use ReportUnit.getComparatorv2(...)
for sorting mechanism.
ReportUnit: logger is no longer used