remove deprecated functions

We have allowed enough time to pass for upgrading to new functions.

close #201
use markdown table syntax for compat table on README

[ci skip]
use stable versions of node
Fix typo in README.
Merge pull request #222 from fdb/patch-1

Fix typo in README.
Remove the seed_length argument

bcrypt_gensalt expects a seed array of exactly 16 bytes;
other values are not useful.
Merge pull request #225 from jfirebaugh/remove-seed-length

Remove the seed_length argument
Use crypto.randomBytes rather than using OpenSSL directly
Merge pull request #227 from jfirebaugh/crypto.randomBytes

Use crypto.randomBytes rather than using OpenSSL directly
Add arity checks
#include <stdlib.h> for atoi
Node 0.6/0.8 compatibility
Merge pull request #229 from jfirebaugh/crypto.randomBytes

arity checks, atoi, node 0.6 and 0.8 comp fixes.
Removed wscript file because it's no longer used.

Signed-off-by: Nick Campbell <nicholas.j.campbell@gmail.com>
Consistent indentation.
Remove redundant loose equality checks against undefined.
Use strict mode.
Remove `else`s after exits.
Fix logic for type checks.
Use HTTPS links where appropriate.