Added SPIDEROSM_INFO.json and using in __init__.py and setup.py
spiderosm.__version__ now set in __init__.py
added logging with spiderosm version info.
added crashhandling to log system info on crash.
config now reads config files on load, simplifies top-levels.
report info on crash.
postgis port, user, password, options etc.
finished cleaning up config.info[], crashhandling etc.
converted README.txt to README.md