Developer Workflow Improvements

Developer workflow improvements as documented in the following bugzilla entry:

https://bugzilla.yoctoproject.org/show_bug.cgi?id=6662

Todo list

SDK

• Randy: getting errors from bitbake about changed signatures - behaviour change after Hongxu's patch?
• Fix runqemu(and possibly other tools?) since we no longer have the nativesdk sysroot (Add them to buildtools-lite?)
• nativesdk-qemu-helper_1.0.bb and qemu-helper_1.0.bb don't publish the same set of files. Investigate, since runqemu(and possibly other things) may need to come from the buildsystem's native sysroot.
• When publishing the SDK(tool not available yet), warn the user if there are items added to the image/distro via local.conf and suggest moving the items the distro or image config.
• Add a message to the start of the environment script with pointers to the things you can do with it

recipetool

• Rudimentary spec file conversion?
• Ability to do interactive adds via a UI
• Add comments in on do_configure(_append), do_install_(append) etc.
• Handle USE_* options in Makefiles?