maktaba#library#Require doesn't respect names from addon-info.json

[dbarnett]

Maktaba has trouble consistently reading the right plugin names from addon-info.json for some functions like maktaba#library#Require. If you have a library plugin that looks like

somedirname/
somedirname/addon-info.json  <-- contains {"name": "mylib"}
somedirname/autoload/mylib.vim

and you execute

set rtp+=path/to/somedirname
call maktaba#library#Require('mylib')

the Require call will fail saying mylib was not found.

Calling maktaba#plugin#Detect() will fix this, but maktaba ought to be able to detect the right plugin name without it.