Build Chain Fails When URI has Trailing /

[jhkolb]

The bw2 router crashes if you attempt to build a chain from the command line and the URI has a trailing /. For example, the following command works correctly:

bw2 bc -u jkolb/demo/out -t <entity>

While this command crashes the router:

bw2 bc -u jkolb/demo/out/ -t <entity>

Here's the output from the router:

[CRT] 21:40:08 2016-05-24 commands.go:354 CB fail: Invalid URI
panic: Invalid URI

goroutine 1690 [running]:
panic(0x118ebe0, 0xc820207950)
        /usr/local/go/src/runtime/panic.go:464 +0x3e6
github.com/immesys/bw2/adapter/oob.(*boundFrame).cmdBuildChain.func2(0xc824933a80, 0xc8240203a0)
        /go/src/github.com/immesys/bw2/adapter/oob/commands.go:355 +0x2a7
created by github.com/immesys/bw2/adapter/oob.(*boundFrame).cmdBuildChain
        /go/src/github.com/immesys/bw2/adapter/oob/commands.go:383 +0x4cc