More portability fixes for Linux. -- make EpocEnginePathHelper et al produce an IPath that matches an existing path in the filesystem even if the case doesn't match. File#getCanonical* does not do this in Unix. -- SISBuilderInfo2 and bld.inf exports fixes for full path detection -- make some tests less dependent on having specific SDKs available. -- fix some warnings

source.. = src/
output.. = bin/
bin.includes = plugin.xml,\
               META-INF/,\
               .,\
               icons/