[META] Project improvement and cleanup.

[rl2939]

This is a metaissue to document what could be improved. See jspsych/jspsych-contrib#149 for more details

In package.json:

• Flesh it out with other packages for npm integration. #13

In index.js:

• line 34: upgrade version to 1.0.0 #12
• line 65: set type jspsych.ParameterType.STRING, and add array: true #11
• lines 67-70: set debug to true/false #14
• line 109: add author name #15
• line ~186: refactor try/catch statements #16
• lines 219-222: add info property. #17
• lines ~884-887: turn text into parameter #18
• lines ~898-901: turn text into parameter #19