re-add spire (and its dependencies breeze and multibot)

[SethTisue]

I removed these 3 projects in #671 because spire was failing to compile

[spire] [error] /home/jenkins/workspace/scala-2.12.x-integrate-community-build/target-0.9.9/project-builds/spire-5fbe50f072cd8e261bc19152a834475a38379fd2/core/shared/src/main/scala/spire/syntax/std/Ops.scala:154: value on is not a member of spire.algebra.Order[B]
[spire] [error]     implicit val ord: Order[A] = ev.on(f)
[spire] [error]                                     ^
[spire] [error] /home/jenkins/workspace/scala-2.12.x-integrate-community-build/target-0.9.9/project-builds/spire-5fbe50f072cd8e261bc19152a834475a38379fd2/core/shared/src/main/scala/spire/syntax/std/Ops.scala:170: value on is not a member of spire.algebra.Order[B]
[spire] [error]     implicit val ord: Order[A] = ev.on(f)
[spire] [error]                                     ^
[spire] [error] /home/jenkins/workspace/scala-2.12.x-integrate-community-build/target-0.9.9/project-builds/spire-5fbe50f072cd8e261bc19152a834475a38379fd2/core/shared/src/main/scala/spire/syntax/std/Ops.scala:240: value reverse is not a member of spire.algebra.PartialOrder[A]
[spire] [error]     Searching.minimalElements(as)(ev.reverse)
[spire] [error]                                      ^
[spire] [error] /home/jenkins/workspace/scala-2.12.x-integrate-community-build/target-0.9.9/project-builds/spire-5fbe50f072cd8e261bc19152a834475a38379fd2/core/shared/src/main/scala/spire/syntax/std/Ops.scala:305: value on is not a member of spire.algebra.Order[B]
[spire] [error]     implicit val ord: Order[A] = ev.on(f)
[spire] [error]                                     ^

full log at https://scala-ci.typesafe.com/job/scala-2.12.x-integrate-community-build/2570/consoleFull

[SethTisue]

fyi @non @dlwh @tixxit @denisrosset @OlegYch

would someone like to try and sort out what the problem is? I think it's some sort of source incompatibility between the versions of spire and algebra we are using?

[denisrosset]

I think so, the Order typeclass was cleaned up before the cats 1.0.0, but Spire is not yet updated, due to its dependency on algebra.

[SethTisue]

this looks promising: typelevel/spire#673