add test for ? (%01) wildcard
fix off-by-one error in CPESet2_3._compare_strings
fix multiple %01 wildcards

multiple off-by-ones, wrong syntax and stale constants on two lines
turn CPESet2_3.compare_wfns into a generator

This way some comparisons can be short-circuited for faster matches...
correctly transform not applicable values for edition
Coveralls
Merge branch 'release/1.0.6' into develop
Merge branch 'master' into develop
Merge branch 'develop' of github.com:nilp0inter/cpe into develop
Merge branch 'fix-wildcard-matching' of https://github.com/TauPan/cpe into TauPan-fix-wildcard-matching
Merge branch 'TauPan-fix-wildcard-matching' into develop. Closes #5 and closes #6
Merge branch 'fix-multiple-uri-wildcards' of https://github.com/TauPan/cpe into TauPan-fix-multiple-uri-wildcards
Added simple test.
Merge branch 'TauPan-fix-multiple-uri-wildcards' into develop. Closes #7 and closes #8
Merge branch 'fix-as-uri-2.3-not-applicable' of https://github.com/TauPan/cpe into TauPan-fix-as-uri-2.3-not-applicable
Doctests moved to testfile_bugfixes.txt.
Merge branch 'TauPan-fix-as-uri-2.3-not-applicable' into develop. Closes #11
Merge branch 'optimize-compare-2.3' of https://github.com/TauPan/cpe into TauPan-optimize-compare-2.3
Merge branch 'TauPan-optimize-compare-2.3' into develop. Closes #9
Contributing instructions.