rename bundle from privsec to bitcore

...since this library is indeed likely to become the new bitcore

.gitignore

@@ -1,5 +1,5 @@
 *.swp
 coverage
 node_modules
-browser/privsec.js
+browser/bitcore.js
 browser/tests.js

browser/build

@@ -1,4 +1,4 @@
 #!/bin/bash
 
-browserify index.js -o browser/privsec.js
+browserify index.js -o browser/bitcore.js
 ls test/*.js | xargs browserify -o browser/tests.js