readme: explain browserify/Buffer behavior

README.md

@@ -63,7 +63,9 @@ either `le` (little-endian) or `be` (big-endian).
  pad to length, throwing if already exceeding
 * `a.toArrayLike(type, endian, length)` - convert to an instance of `type`,
  which must behave like an `Array`
-* `a.toBuffer(endian, length)` - convert to Node.js Buffer (if available)
+* `a.toBuffer(endian, length)` - convert to Node.js Buffer (if available). For
+ compatibility with browserify and similar tools, use this instead:
+ `a.toArrayLike(Buffer, endian, length)`
 * `a.bitLength()` - get number of bits occupied
 * `a.zeroBits()` - return number of less-significant consequent zero bits
  (example: `1010000` has 4 zero bits)

lib/bn.js

@@ -50,6 +50,7 @@
 
  var Buffer;
  try {
+ // Obfuscate that we require Buffer, to reduce size
  Buffer = require('buf' + 'fer').Buffer;
  } catch (e) {
  }