loadConfig fixed to support relative

This fixes loadConfig to work as the docs show:
azuqua.loadConfig("./account.json"); when azuqua.js is located away
from the requiring code.
loadConfigAsync

Fix for loadConfig, applied to loadConfigAsync. See
https://github.com/azuqua/azuqua.js/commit/3bb6598f577b57bbafac0c3cd4728
cd34945dcf8
more fixes
Merge pull request #1 from azuqua/fix-configpath

Fix require statement for relative paths from the root application