Update README.md

Author: MasonProtter

README.md

@@ -9,7 +9,7 @@ This is an experimental package to compile Julia code to standalone libraries. A
 
 ```julia
 using Pkg
-Pkg.add(PackageSpec( url = "https://github.com/tshort/StaticCompiler.jl", rev = "master"))
+Pkg.add("StaticCompiler")
 ```
 
 ```julia
@@ -51,4 +51,4 @@ This package uses the [GPUCompiler package](https://github.com/JuliaGPU/GPUCompi
 * GC-tracked allocations and global varaibles do *not* work with `compile_executable` (yet).
 * Type unstable code is not yet supported.
 * Doesn't currently work on Windows.
-* If you find any other limitations, let us know. There's probably lots.
+* If you find any other limitations, let us know. There's probably lots.