Update README, moving documentation to the project home page

The documentation is now at http://fsharp.github.com/FAKE

There is an 'edit' link on that page, and you can also push/pull to the gh-pages branch of the fsharp/FAKE repository.
Update src/app/FakeLib/StringHelper.fs

Adding the DecodeBase64Utf8String function to the string helper
Removed version normalization from NuGet package creation
Merge pull request #61 from SimonHohenadl/develop

Cannot create NuGet package with version "1.0.0"
Get correct name for F# Interactive on *nix

The standard name of F# interactive on unix is "fsharpi"  (fsharpc is
the compiler, not fsc since that clashes with another tool. fsharpi is
named for consistency with fsharpc).

Some older F# 2.0 installs on unix use fsi.

This probes for fsharpi.

To test, I built FAKE (on Mac using F# 3.0's new xbuild)

   xbuild FAKE.sln

It built!!  And then ran FAKE.exe to try to build FAKE with the new FAKE

   mono tools/FAKE/FAKE.exe

We still get an error:

/Users/funnelweb/Projects/GitHub/funnelweb/FAKE/build.fsx(1,1): warning
FS0211: The search directory
'/Users/funnelweb/Projects/GitHub/funnelweb/FAKE/tools\FAKE' could not
be found

That looks like a path separator problem '\', anyway, we're a little
way to getting off the ground here….
Add support for file loggers to MSBuildHelper.fs
Merge pull request #62 from mavnn/master

Add File Logger Support to MSBuildHelper.fs
Add support for file loggers to MSBuildHelper.fs
Merge branch 'develop' of github.com:fsharp/FAKE into develop
Append NUnit parameters in format NunitConsole will accept.
Change string helper to not wrap values in quotes.
Add SetTeamCityParameter helper

A function just called SetParameter seemed a bit too confusing...
Merge pull request #63 from mavnn/develop

Append NUnit parameters in format NunitConsole will accept.
New self build using #1.64.15.0
Removing strange file
Updating nuget.exe to 2.1.2
Made the NUnit task use hyphens rather than forward slashes.
Added a hyphen also for no logo
Using a different package for the download test
New self build