* Update Travis CI to use latest Go releases
* Fix go vet issues for Go 1.10
Starting in Go 1.10, the `go test` command now automatically runs `go
vet`. This commit fixes two issues flagged by vet that cause `go test`
to fail.
* Fix gofmt issue for Go 1.10
Go 1.10 introduced a small formatting change with comments in empty
multiline slice definitions. This commit attempts to move the offending
comment in such a way that all version of gofmt will agree on its
location.
* Remove go-vet from test.sh
Starting in Go 1.10, the `go test` command automatically runs `go vet`,
so we don't need to run `go vet` explicitly from within test.sh.
Fixes#222
Move all the query system to its own package. The reason is to
avoid it to rely on unexported methods and structures, and move
it out of the main package since this is really not a core
feature. It is still tied to the toml.TomlTree and toml.Position
structures for now.
* Move query mechanism to its own subpackage
* Rename QueryResult to Result to avoid stutter
* Add query.CompileAndExecute
Fixes#116
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