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
<contexts>
<context id="hoverHelpContext">
<description>Hover Help Guide</description>
<topic href="resources/help context/dl_hover/html/getting_started.html" label="Overview"/>
<topic href="resources/help context/dl_hover/html/setup.html" label="Set Up"/>
<topic href="resources/help context/dl_hover/html/preferences.html" label="Preferences"/>
</context>
</contexts>