v1.0.0

Substantial refactor of the tumblr.js library.

• Naming of API method standardized. This is a breaking change, but switching to the new method names is straightforward!
• Rewritten method implementation to make it easier to map methods to API endpoints
• Tumblr API baseUrl is now customizable, if that's your jam
• data64 support where it makes sense
• Split tumblr.js REPL into a separate repository to keep dependency weight down
• Oh yeah, we updated all the dependencies and devDependencies
• Dropped Browserify support. Sorry, but you probably won't miss it.
• Added eslint rules
• New mocha tests