Merge branch 'master' of https://github.com/FreekDB/trait_proteomics_qc_tool into FreekDB-master

Conflicts:
	ProteomicsQCReportViewer/src/nl/ctmm/trait/proteomics/qcviewer/Main.java
Added proper exception handling and status message update - on not
finding qc_status.log file.
Adding support for using the class FilenameUtils to interpret file name
prefixes - so that the viewer runs properly on both - Windows and Unix
platforms. 
Added jar file org.apache.commons.io.jar
Removed prepareLogger() function for all the classes. Integrated
prepareAllLoggers() function in the Main class (provided by Freek).
Removed DatePicker.java - since license for using this class is unknown. 
Replaced DatePicker.java functionality by JCalendar Java Bean -
http://www.toedter.com/en/jcalendar/ that uses GNU LGP license. 
Added jcalendar-1.4.jar library from JCalendar.
Removed low-resolution logos of CTMM, CTMM-TraIT and NBIC. 
Added high-resolution logos of CTMM, CTMM-TraIT and NBIC. 
Updated paths of logos in Constants.java.
Started with Maven configuration for building the project.
Removed TODOs from SortedListModel and ChooseMetricsForm
Removed extra comments from SortedListModel and ChooseMetricsForm
Resolved conflict after merge with master branch.