Basic constants and conversions framework.
Merge branch 'master' into Constants
Revert "add accumulate test"

This reverts commit 181cb78e6fd1e164bc44a7a7dec38ad06ff574bd.
Revert "@expand.valify"

This reverts commit d8118f877327f99613af66c69db03724db665f07.
Revert "accumulate.scala"

This reverts commit 342831b8c1c0d8a2cefda37fb8133b398e737e81.
Merge branch 'master' into Constants
Merge branch 'Constants'
Merge branch 'filter1' into Constants

Conflicts:
	src/test/scala/breeze/linalg/LinearAlgebraTest.scala
Merge branch 'master' of https://github.com/ktakagaki/breeze

Conflicts:
	src/test/scala/breeze/linalg/LinearAlgebraTest.scala
toVector
Merge pull request #155 from ktakagaki/DenseVector

toVector
Merge pull request #154 from ktakagaki/filter1

Filter1
Merge remote-tracking branch 'remotes/origin/Constants'
Merge branch 'master' of https://github.com/ktakagaki/breeze
Filter kernel casting