Typescript Fetch API wrapper for Skycoin node API

## Expected Behavior
Access to Skycoin node REST API implemented in Typescript using fetch.

## Actual Behavior
Right now this is not possible.

## Specifications

- Version: 0.27.0
- Platform: all
- Subsystem: all exported API sets

## Possible Solution
- [ ] Use Skycoin node Swagger spec to generate initial Typescript REST API client
- [ ] Add make target to automate generation in ./build
- [ ] Aforementioned target should copy / merge relevant files into source code tree
- [ ] README explaining the process
- [ ] Mention in CHANGELOG
- [ ] Patch the result Swagger-gen REST client to support specifying node address
- [ ] Update package metadata
- [ ] Run basic Swagger tests in Travis
- [ ] Unify testing code if multiple frameworks are used across source tree
- [ ] Beware of CSRF auth