2015-04-17 io.js v1.8.0 Release

Notable Changes:

* build: Support for building io.js as a static
  library (Marat Abdullin) #1341
* deps: upgrade openssl to 1.0.2a (Shigeki Ohtsu) #1389
* npm: Upgrade npm to 2.8.3. (Forrest L Norvell) #1448
* src: allow multiple arguments to be passed to
  process.nextTick (Trevor Norris) #1077
* module: the interaction of require('.') with NODE_PATH has been
  restored and deprecated. This functionality will be removed at
  a later point. (Roman Reiss) #1363