format functions to follow JavaScript Style Guide

[valpasq]

Formatting should be updated to follow community standards.

Google JavaScript Style Guide available here: https://google.github.io/styleguide/jsguide.html

Checklist of current scripts:

• [ ] utils > estimators
• [ ] utils > misc
• [ ] utils > sampling
• [ ] 0. Create stratification > 0. Create stratification from GFC map
• [ ] 1. Sampling Design > Simple Random Sample
• [ ] 1. Sampling Design > Stratified Sample
• [ ] 2. Sample Interpretation > Save Feature Timeseries
• [ ] 2. Sample Interpretation > Time Series Viewer
• [ ] 3. Estimation > Ratio Estimator when Map != Stratification
• [ ] 3. Estimation > Stratified Estimation