Yocto Project 1.4 Migration notes

Changes in 1.4 that impact migration

STAMP and WORKDIR were redefined in this release such that they are now structured <name>/<version> instead of <name>-<version>.

All uses of FILESDIR were removed from OE-Core. FILESPATH was also massively simplified, particularly recipes with files in the current directory are no longer supported by default (use a <name>-<version> or 'files' directory to contain them). Files in -native recipes may also need tweaking since we now only use BPN as the package name to search for, not PN.