Allow function name which starts with underscore

[tyru]

Fix #133

[blueyed]

LGTM, needs to generate py/js.

[blueyed]

Should we only run Travis for master branches (from origin) - or should we use forks for PRs?
(I mean that here Travis ran two times, for the PR and then also for the branch on the main repo)

[tyru]

travis-ci/pr and travis-ci/push check the pull request branch and merged branch (I forgot which one check that).
master may be changed after push, so we need both.

[tyru]

thanks for view.

[tyru]

s/view/review/

[blueyed]

travis-ci/pr and travis-ci/push check the pull request branch and merged branch (I forgot which one check that).
master may be changed after push, so we need both.

The important one is the "pr" check (which tests the merge with master).
The other checks the branch as-is (and there it might pass, although it fails for the merge).
Therefore usually testing "pr" for PRs is fine - and happens when creating the PR from a fork (and not the main repo). When using the main repo for PRs also, you usually configure Travis to only build the master branch, and release tags.