JasperReports-related polishing
Compilation compatibility with JasperReports 5.5.2
Building against Groovy 2.3 instead of 1.8; updated several dependencies to latest maintenance releases (JasperReports 5.5.2, Tiles 3.0.4, Jetty 9.1.5)
Building against Quartz 2.2.1 and JavaMail 1.5.2
Undertow-related polishing