added method toString to class ReportParameters which prints all fields, variables and parameter values

git-svn-id: http://svn.code.sf.net/p/dynamicreports/code/trunk@795 bf0c503b-2351-4f66-9eae-aa52f3279a3f
added a new method getSubreportWidth to class ReportParameters that returns the available width for a subreport

git-svn-id: http://svn.code.sf.net/p/dynamicreports/code/trunk@796 bf0c503b-2351-4f66-9eae-aa52f3279a3f