Phase 1 of repo reorg (#719)

* Remove unneeded script

* Rename Substrate Demo -> Substrate

* Rename demo -> node

* Build wasm from last rename.

* Merge ed25519 into substrate-primitives

* Minor tweak

* Rename substrate -> core

* Move substrate-runtime-support to core/runtime/support

* Rename/move substrate-runtime-version

* Move codec up a level

* Rename substrate-codec -> parity-codec

* Move environmental up a level

* Move pwasm-* up to top, ready for removal

* Remove requirement of s-r-support from s-r-primitives

* Move core/runtime/primitives into core/runtime-primitives

* Remove s-r-support dep from s-r-version

* Remove dep of s-r-support from bft

* Remove dep of s-r-support from node/consensus

* Sever all other core deps from s-r-support

* Forgot the no_std directive

* Rename non-SRML modules to sr-* to avoid match clashes

* Move runtime/* to srml/*

* Rename substrate-runtime-* -> srml-*

* Move srml to top-level

substrate/pwasm-alloc/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "pwasm-alloc"
+version = "0.1.0"
+authors = ["Nikolay Volf <nikvolf@gmail.com>"]
+license = "MIT/Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/paritytech/pwasm-std"
+homepage = "https://github.com/paritytech/pwasm-std"
+documentation = "https://paritytech.github.io/pwasm-std/pwasm_std/"
+description = "Parity WebAssembly standard library internal allocator"
+keywords = ["wasm", "parity", "webassembly", "blockchain"]
+categories = ["no-std", "embedded"]
+build = "build.rs"
+
+[dependencies]
+pwasm-libc = { path = "../pwasm-libc", version = "0.1" }
+
+[build-dependencies]
+rustc_version = "0.2"
+
+[features]
+strict = []
+nightly = []

substrate/pwasm-alloc/README.adoc

@@ -0,0 +1,25 @@
+
+= Pwasm-alloc
+
+Parity WASM contracts standard library libc bindings.
+
+See https://paritytech.github.io/pwasm-std/pwasm_alloc/ for the documentation.
+
+== License
+
+`pwasm_alloc` is primarily distributed under the terms of both the MIT
+license and the Apache License (Version 2.0), at your choice.
+
+See LICENSE-APACHE, and LICENSE-MIT for details.
+
+.Summary
+[source, toml]
+----
+include::Cargo.toml[lines=2..5]
+----
+
+.Description
+----
+include::src/lib.rs[tag=description]
+----
+

substrate/pwasm-alloc/build.rs

@@ -0,0 +1,14 @@
+//! Set a nightly feature
+
+extern crate rustc_version;
+use rustc_version::{version, version_meta, Channel};
+
+fn main() {
+    // Assert we haven't travelled back in time
+    assert!(version().unwrap().major >= 1);
+
+    // Set cfg flags depending on release channel
+    if let Channel::Nightly = version_meta().unwrap().channel {
+        println!("cargo:rustc-cfg=feature=\"nightly\"");
+    }
+}

substrate/pwasm-alloc/src/lib.rs

@@ -0,0 +1,34 @@
+#![warn(missing_docs)]
+#![cfg_attr(feature = "strict", deny(warnings))]
+#![no_std]
+#![crate_type = "rlib"]
+
+// tag::description[]
+//! Custom allocator crate for wasm
+// end::description[]
+
+/// Wasm allocator
+pub struct WasmAllocator;
+
+#[cfg(feature = "nightly")]
+#[global_allocator]
+static ALLOCATOR: WasmAllocator = WasmAllocator;
+
+#[cfg(feature = "nightly")]
+mod __impl {
+	extern crate pwasm_libc;
+
+	use core::alloc::{GlobalAlloc, Layout};
+
+	use super::WasmAllocator;
+
+	unsafe impl GlobalAlloc for WasmAllocator {
+		unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
+			pwasm_libc::malloc(layout.size()) as *mut u8
+		}
+
+		unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
+			pwasm_libc::free(ptr as *mut u8)
+		}
+	}
+}