Support for binary deployment

This pull changes the behavior of `node-sqlite3` builds to prefer installation from pre-built binaries. Closes #67

This makes it easier and faster to run `npm install sqlite3` on OS X, Linux, and Windows without any compiler being available and also even without `python` and `node-gyp`. When a user runs `npm install sqlite3` or `npm install` from the source checkout first a binary `node-sqlite3.node` file will be fetched, if available, from a remote repository of binaries managed by @springmeyer on s3/cloudfront. If a binary is not available that matches what the user needs then the build system will fall back to a source compile.

If a developer wants a source compile instead of a binary then she can pass `--build-from-source` or `--build-from-source=sqlite3` to the args passed to `npm install` or `node-gyp`.

Binaries are versioned based on:

`{configuration folder}/node-sqlite3-{MAJOR}.{MINOR}.{ABI}-node-v{ABI}-{platform}-{arch}`

Details:

1. Release/Debug configuration
1. node-sqlite3 version, specially MAJOR.MINOR.ABI where MAJOR and MINOR match the semver version of the module but ABI is a special letter that is manually incremented by node-sqlite3 developers when the c++ code in src changes enough to warrant new builds. This allows the semver PATCH to be incremented independently of binary compatibility and will allow for easy tagging of new PATCH versions without new binary builds. 
1. Node [`process.versions.modules` number](https://github.com/joyent/node/blob/756b6222956b5d25b2e7db81f4e79033a3a4d20e/src/node_version.h#L67), which is a manually incremented (by node.js core developers) version that indicates ABI breakages in node's C++ API. For older node versions (before v0.10.x) where this is not available the v8 MAJOR.MINOR version that node.js included is used instead
1. platform: e.g. `win32`, `linux`, `darwin`
1. arch: eg. 32 bit (ia32, aka i386) or 64 bit (x64, aka x86_64)

Currently these are the `Release` builds available:

```
s3cmd ls s3://node-sqlite3/Release/*
2013-09-08 22:54    383667   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-node-v11-darwin-ia32.tar.gz
2013-09-08 22:54    400503   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-node-v11-darwin-x64.tar.gz
2013-09-08 22:32    435705   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-node-v11-linux-x64.tar.gz
2013-09-08 22:32    379754   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-node-v11-win32-ia32.tar.gz
2013-09-08 22:32    460186   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-node-v11-win32-x64.tar.gz
2013-09-08 22:32    410606   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.11-linux-x64.node.gz
2013-09-08 22:32    436081   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.11-linux-x64.tar.gz
2013-09-08 22:32    347648   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.14-darwin-ia32.node.gz
2013-09-08 22:32    347244   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.14-darwin-ia32.node.tar.gz
2013-09-08 22:32    364251   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.14-darwin-x64.node.gz
2013-09-08 22:32    363995   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.14-darwin-x64.node.tar.gz
2013-09-08 22:32    410518   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.14-linux-x64.node.gz
2013-09-08 22:32    435760   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.14-linux-x64.tar.gz
2013-09-08 22:32    379038   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.14-win32-ia32.node.gz
2013-09-08 22:32    459215   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.14-win32-x64.node.gz
2013-09-08 22:32    508678   s3://node-sqlite3/Release/node_sqlite3-v2.1.a-v8-3.6-linux-x64.node.gz
```