Make intellij plugin forwards-compatible

Updated to generate classes using the version defined in the build.gradle. This
way, the intellij plugin does not need to be updated every time the gradle
plugin is. Version 1.3.0 of the gradle plugin is still supported, by may be
dropped in a later update.
set compile-model to version 1.0.0 since it should not change with most updates
support goto decleartion for holdr fields
support rename refactor of Holdr classes
prepare for release
fix path replacement on windows, fixes #33
Merge branch 'develop'