Merge pull request #18 from eiriktsarpalis/master

fix FsiExe misconfiguration
Add typed signature data to F# compielr service, first cut (removing FSharp.PwoerPack.Metadata)
Rename operations (DataTip --> ToolTip etc.)
simplify fsiConfig in the common case
Renamings and other improvements to SourceCodeServices API
add travis build
add travis build
Update README.md
Update README.md
Update docs for file system
Merge branch 'master' of https://github.com/fsharp/FSharp.Compiler.Service
Update docs