document GetdownPluginExtension + change type of dest & destVersion from String to File
remove trace of launch4j anttask
use File instead of string into configuration, and resources for getdown.txt instead of multi-line string
replace appbase by urlbase
fix serialVersionUID to 0 for Platform and JreVersion
update README
fix bug in Platform definition for linux
serialVersionUID to 1L
template getdown.txt fix path of jres
0.2.0