Changed the interface of the New-Fixture function to make it really easy
to use when you want to create a new fixture in the current directory.
You can also create new fixture in relative or full path but you must
use the -Path parameter in that case ( New-Fixture -Path new Test-Item
). Changed the help a bit. Moved the New-Fixture and Create-File out of
the main module and added tests.
Merge branch 'New-Fixture' of https://github.com/nohwnd/Pester into New-Fixture

Conflicts:
	Functions/New-Fixture.Tests.ps1
	Functions/New-Fixture.ps1
	Pester.psm1