Instantiate module & Hover fix

[Yushiao]

Hi~

I make a command that can instantiate 2001-style verilog module (sorry for only 2001-style)

Usage:

1. Open command palette Ctrl+Shift+P and type System Verilog: Instantiate Module
2. Choose file you want to instantiate
3. It will insert inst at cursor location

By the way, I update the hover function that not show the last , and ; now

[bjaminn]

Looks like good work. Would there be a way to add an example of the instantiation in the README.md? I could do it after the request gets accepted if not.

[mshr-h]

Thanks for new feature and bugfix.

It looks good to me.
But sending bugfix / new feature / package config update / travis-ci config update in the same PR is messed-up.
So, please split into multiple PRs.

[Yushiao]

@bjaminn I think @mshr-h will update README.md and version numbers after the PR is merged

@mshr-h OK, I will split this PR to 3 PRs

1. package config update / travis-ci config update
2. hover bugfix
3. instantiate module