(livesync) Wait for filesystem changes after prepare hook.
(livesync) Wait for filesystem changes after prepare hook.

Allow for calling out to compilers in hooks and collecting changed files
afterwards.

Allow changes to excluded files (*.ts) to trigger a sync, and filter
those files out after the platform is prepared.

Fix livesync file filter bug on ios.

telerik/mobile-cli-lib,telerik/mobile-cli-lib