[TASK] Adjust unit test to avoid spl_object_hash warning
Merge pull request #141 from NamelessCoder/unittest

[TASK] Adjust unit test to avoid spl_object_hash warning
[TASK] Add Travis-CI build script
[TASK] Simplified local part of Travis-CI build configuration
[DOC] Added Travis-CI status image to README readout
[TASK] Adjust testing environment: local phpunit.xml, use forked repositories
[TASK] Adjust Travis-CI configuration to use local phpunit.xml
[TASK] Update sequence of commands in Travis-CI configuration