Basic configuration for travis-ci
Install GTK3 development files
Update README.md
Xcode 4 comes with a version of clang that treats inline differently: it requires exactly one definition of the inline function in the linked unit. static inline is C99-compliant (according to LeoNerd in freenode/##c) and does not have this problem, so use that in objc_darwin.h instead.

Fixes issue 1.
Add a note about the Mac OS X version of package ui requiring Go 1.3 to the README.

Updates issue 1.
Merge pull request #3 from tompao/travis-ci

Example of continuous integration setup with Travis-ci
Updated Travis.ci badge for andlabs/ui.
Whoops; actually need build=master there; also remove extra space
Configured the Travis.cl configuration to cross-compile Windows and Linux for both 386 and amd64.
Whoops, looks like Travis.cl hates { cmd; } in its before_install: block; also forgot the cgo flags for linux/386.
...hopefully NOW the linux/386 Travis.ci build will be fixed?
...and that's what I get for not knowing or remembering what I was doing/trusting the first answer on stackoverflow.
Disabled Travis.ci's linux/386 build for now; not sure how to fix it.
Travis.ci isn't actually building the package because there's no test files; fix that.
Now that they appear to work, make Travis.ci builds verbose.
One more try with Travis.ci: this time start with multiarch support explicit.
Remove the 32-bit GTK+ from linux/386 Travis.ci builds; I have no idea how to fix this.
Have ui.Go() return on main() return on Windows.
Have ui.Go() return on main() return on Unix.
Have ui.Go() return on main() return on Mac OS X.