Replace HTML error responses meant for browsers with meaningful error messages

[tucked]

For example, when I give the wrong password, I get a JIRAError with pages and pages of HTML... to the terminal of my CLI application. If I catch the exception and inspect the available attributes, there doesn't seem to be anything useful for just getting a plain error message. Am I missing something, or are my users doomed to read code meant for machines when things go wrong? 😋

[studioj]

@tucked you are always free to open a PR to improve the library.