Upgrade typescript source code to the latest

[gfx]

The layout of source files of 1.4.x is too different from 1.0.0.

[bdrazhzhov]

I think it would be great to use installed typescript compiler if it is installed. But if compiler would not be found in system gem would use internal compiler.

[bdrazhzhov]

Typescript source code is updated to v1.4.1.

[amritk]

@bdrazhzhov could you update on rubygems?

[bdrazhzhov]

Currently I don't have permission for updating on rubygems. I've asked owner about it. When I get permission I'll update gem on rubygems.

[bdrazhzhov]

@amritk, I've pushed new version of gem to rubygems.