Improve plugin distribution size/download

[YannCebron]

Current download size is >150MB, every plugin update requires this full download and this might be challenging for some users depending on their connectivity.

If possible, download (com.intellij.util.download.DownloadableFileService) and store the edu.cmu.sphinx.models.en-us, en-parser-chunking.bin and other big (binary) data in user's config folder instead of packaging it with plugin.