Add include & exlude parameters to #tool directive

[devlead]

Currently #tool directive exclusively looks for *.exe, this locks out a few scenarios including CoreCLR as command line assemblies there have dll extension.

Proposed fix for this is to add 2 new optional parameters to the #tool directive that lets you specify your own globbing pattern to override the default behavior.

parameter	description	example
include	pattern of which files to look for	#tool nuget:?package=Cake.Foo&include=./**/Foo.dll
exclude	pattern of which files not considered tools	#tool nuget:?package=Cake.Foo&exclude=./**/*Serializer*.dll

You should also be able to specify multiple globbing patterns i.e.
#tool nuget:?package=Cake.Foo&include=./**/*.dll&include=./**/*.exe&exclude=./**/*Serializer*.dll&exclude=./**/Foo.dll

[patriksvensson]

@gep13 @devlead Anyone started with this yet or can I implement this?

[devlead]

@patriksvensson no