Update build instructions

[richsad]

The README.md files for the examples say to run:
npm build

Doing this does nothing on node.js 0.10.26. However, if you do:
node-gyp configure
node-gyp build

It builds the C++ and then do:

node run.js

You are able to use the examples. You may want to update the docs since in general the people using these examples are total newbs to building native C++ extensions for node (like me!). Thanks a lot for contributing these examples.

[mn1aC]

When I do node-gyp build I get:

CXX(target) Release/obj.target/node-cpphello/cpphello.o
../cpphello.cpp:7:32: error: unknown type name 'Arguments'; did you mean 'v8::internal::Arguments'?
static Handle foo(const Arguments& args)
^~~~~~~~~
v8::internal::Arguments
/Users/sven/.node-gyp/0.12.0/deps/v8/include/v8.h:127:7: note: 'v8::internal::Arguments' declared here
class Arguments;
^
../cpphello.cpp:9:18: error: no member named 'New' in 'v8::String'
return String::New("Hello World");
~~~~~~~~^
../cpphello.cpp:14:3: error: no matching function for call to 'NODE_SET_METHOD'
NODE_SET_METHOD(target, "foo", foo);
^~~~~~~~~~~~~~~
/Users/sven/.node-gyp/0.12.0/src/node.h:240:25: note: expanded from macro 'NODE_SET_METHOD'
#define NODE_SET_METHOD node::NODE_SET_METHOD
^~~~~~~~~~~~~~~~~~~~~
/Users/sven/.node-gyp/0.12.0/src/node.h:228:13: note: candidate function [with TypeName = v8::Handlev8::Object] not viable: no known conversion from 'Handlev8::Value (const v8::internal::Arguments &)'
to 'v8::FunctionCallback' (aka 'void (*)(const FunctionCallbackInfov8::Value &)') for 3rd argument
inline void NODE_SET_METHOD(const TypeName& recv,
^
3 errors generated.

[mn1aC]

Seems like v8 is not included? How to solve this?