add initial test setup for benoitc/econfig#4
additional return checks in setup functions for benoitc/econfig#4
build before running tests for benoitc/econfig#4
add modify and subscribe tests for benoitc/econfig#4
Merge pull request #5 from unix1/feature-tests

add initial test setup for benoitc/econfig#4
correctly parse comments at the end of the line.
fix issue when key or value contains \t

Whitespaces are now trimmed at the beginning and end of keys and values.