[ticket/273] Only show portal files in coverage report

B3P-273
[ticket/273] Add coverage badge to README.md

B3P-273
[ticket/273] Add more excluded directories to filter

B3P-273
[ticket/273] Add script for modifying phpunit-mysqli-travis.xml

B3P-273
[ticket/273] Exclude develop from coverage reports

B3P-273
Merge pull request #274 from marc1706/ticket/273

[ticket/273] Only show portal files in coverage report