fix small bugs
	modified:   grails-app/conf/BootStrap.groovy
	modified:   grails-app/views/ui/welcome.gsp
	deleted:    sample data/Gel Inspector blot1.xls
	deleted:    sample data/ProtA_blot1.xls
	deleted:    sample data/ProtB_blot1.xls
	deleted:    sample data/setup_test.xls
	modified:   src/groovy/org/hits/parser/excelimp/ExcelSource.groovy
	modified:   src/groovy/org/hits/parser/excelimp/ExpandingExcelSource.groovy
	modified:   src/groovy/org/hits/parser/excelimp/ExperimentSetUpParser.groovy
	modified:   src/groovy/org/hits/parser/excelimp/GeneralisedExcelParser.groovy
	modified:   src/groovy/org/hits/parser/excelimp/SetupExcelParser.groovy
	modified:   src/groovy/org/hits/parser/extractExcel/excelReader.groovy
	modified:   web-app/js/jquery.sheet.js
add sample data folder