Features

connector-domparser: replace Apache Http Components with OkHttp
cli: include username in password prompt
cli: default to all courses if the input is blank when prompting the user for the courses to sync, closes #7

Fixes

cli: handle failed login properly
cli: show course selection if no courses are active
common-ui: create parent dirs for settings file if parent don't exist
connector-domparser: try to preserve content's original encoding otherwise use iso 8859-1
cli: print "login successful" msg only if login succeeded
cli: update activeCourse ids only once + make them unique
connector-domparser: extract base url from trimmed url string
connector-domparser: correctly prepend 'https://'