Changes variables to be set with +=
Merge branch 'master' of github.com:renatocf/make
Object factories allow different roots for objects
Adds directory for coverage tests
Adds extension for coverage tests results
Adds program for coverage tests (COV)
Adds flags for coverage test compilation
Adds post processment of flags for coverage test compilation
Corrects binary-specific variable generation
Adds first version of coverage analysis results factory
Adds first version of 'coverage' target