try to fix exe build name
build/build.xml: extract 'platform' target
fix ANT sources location
[build language] copy processors support; use copyModels task to prepare models for the build;
enable ant tasks (even for mpsBootstrapCore project); implement copyModels
detect classpath in ConvertToBinaryTask
regenerate ide.build
[mps-ant] reduce a number of mps-ant-common classes (move to mps-ant)
extract MPSClasspathUtil: better classpath for all MpsLoadTask inheritors
update TestMPSAntTask.zip
fix IdeaPlugin project setup
update ide.build; regenerated; fix classpath for mps.generate task
add libraries into mps.generate classpath
fix IdeaPlugin build.xml