1) Add EpocEngineHelper#hasFeatureVariantKeyword(...)
2) Make sure retrieval of makefile directory and makefile name hadles default ARMV5 case
where config is a variant but the FEATUREVARIANT keyword is not specified.
bin.includes = plugin.xml,\
META-INF/,\
html/,\
index/,\
uiqTOC.xml,\
tocConcepts.xml,\
tocReference.xml,\
tocRelease.xml,\
tocStart.xml,\
tocTasks.xml,\
reference/,\
book.css