Refactor Jumblr

[jmjatlanta]

This PR refactors the Jumblr code for

• better string handling
• better documentation
• no reliance on globals

Now, the Jumblr codebase is wrapped in a class. The object is a global for now, but is flexible and somewhat self-contained, so hopefully will not be a global in the future. Such changes should provide better maintainability and testability.

The constructor takes the KMDUSERPASS and port (formerly the BITCOIND_RPCPORT global).

[jmjatlanta]

In my opinion: Remove this code from the core daemon, and keep it in some "interesting tech" branch.

Modification of this code should probably be relegated to some research branch instead of dev IMO ( I believe @dimxy agrees). Such code (and their changes) should not be a focus for core "komodod", as technologies such as Jumblr aren't a focus of the core chain.

[dimxy]

looks like this PR should be closed and jumblr code is rremoved in PR #551

[tonymorony]

these changes implemented in combined PR: #559