add --version flag
re-init resolver cache in setup; fixes reload
use "git describe --tags" for versioning
commandline help
tss.vim: fix completion/update interactions

- force updates during completion, while still in insert mode
- use 'update nocheck' at completion start, for speed (#14)
- fall back to full 'update' when completion fails (#13)
update CHANGES/README
add TypeScript src dependency; record test diff
update TypeScript; accept test output; record package version

- looks as if TS issue 1592 might be fixed? at least our test case is