http.ServerResponse: publish headerSent, getHeader, write
http.ServerRequest: add getHeader
Bump version to v0.0.14
updated read me
fix(util.loadFile): do not override the exceptions

Closes #6
feat(fs): support relative paths
Bump version to v0.0.15
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into sharath_absolute_paths