introduced effective options computed concept
test usage of p6spy without spy.properties present; fixes #89
proved that spy.properties can have space in path; fixes #80
tests for space in path with p6.home system proerpty as well
options package: fixed license headers, added test cases, updated config and usage docs
considering the defaults in test P6Test*.properties files
Merge pull request #98 from p6spy/spy.log

options handling refactored; fixes #29