Use build.py -j2 on travis.

Avoids OOM during rollup.

.travis.yml

@@ -34,7 +34,8 @@ install:
  - export CCACHE_SLOPPINESS=time_macros
  - ccache -s
  - ./tools/setup.py
- - ./tools/build.py
+ # Travis hangs without -j2 argument to ninja.
+ - ./tools/build.py -j2
 script:
  - ./tools/lint.py
  - ./tools/test.py $DENO_BUILD_PATH

README.md

@@ -22,7 +22,7 @@ Window [![Windows](https://ci.appveyor.com/api/projects/status/cc7nd82n34xo4nym/
 
 * File system and network access can be controlled in order to run sandboxed
  code. Defaults to read-only file system access and no network access.
- Access between V8 (unprivileged) and Golang (privileged) is only done via
+ Access between V8 (unprivileged) and Rust (privileged) is only done via
  serialized messages defined in this
  [flatbuffer](https://github.com/denoland/deno/blob/master/src/msg.fbs). This makes it
  easy to audit.