Move sqlbuilder and reflectx to lib.

Makefile

errors.go

internal/sqladapter/collection.go

internal/sqladapter/database.go

internal/sqladapter/result.go

internal/sqladapter/testing/adapter.go.tpl

internal/sqladapter/testing/adapter_benchmark.go.tpl

internal/sqladapter/tx.go

lib/reflectx/LICENSE

lib/reflectx/README.md

lib/reflectx/reflect.go

lib/reflectx/reflect_test.go

lib/sqlbuilder/.travis.yml

lib/sqlbuilder/builder.go

lib/sqlbuilder/builder_test.go

lib/sqlbuilder/cache/cache.go

lib/sqlbuilder/cache/cache_test.go

lib/sqlbuilder/cache/hashstructure/LICENSE

lib/sqlbuilder/cache/hashstructure/README.md

lib/sqlbuilder/cache/hashstructure/hashstructure.go