build MonoAndroid and MonoTouch on Windows too
create nupkg when run on AppVeyor
appveyor version must be a string
constants defined in FSharpSource.targets instead
%~dp0
3.1.2 libraries from 3.1.1
added back -NoDefaultExcludes
switch back to "FSharp.Core"
Separate the all-monotouch-monodroid target into two all-monotouch and all-monodroid targets.

This makes it possible for the monotouch and the monodroid builds
to not depend on having the other installed.

It also makes the builds faster (by building less).
Merge pull request #361 from rolfbjarne/split-mobile-make-targets

Split the all-monotouch-monodroid target
Delete Microsoft.Portable.FSharp.targets

as it's a duplicate of Microsoft.Portable.FSharp.Targets
Merge pull request #360 from ctaggart/monodroid

FSharp.Core 3.1.2.1
Unicode letters & operators

examples:
let ★ x = x + 5
let (|★) x y = x + y
let summ = ★ 5 |★ 5
comment about \So infix operators
.sharingan.yml