Added an un-descripted version of the splash
Implemented ticket #283 "Enhance the tooltip information for commands" Added also some little fixes about the editor tool tips
Implemented ticket #263 "Enable passing cache names as arguments in procedures"
Implemented ticket #267 "Enhance the file tree browser"
Implemented ticket #270 "Add drag'n'drop and 'insert here' to 'edit TABLE()'"
Implemented ticket #282 "Add time formatting functions"
Implemented ticket #272 "Improve the interface of 'sort'"
Implemented ticket #274 "Add more 'vline's and 'hline's to plots"
Implemented ticket #264 "Enable tooltips while typing into function's argument's parentheses"
Implemented ticket #276 "Add function 'findcolumn()'"