Build restructure option 2 : optional execution using profiles

[BlazingTwist]

This makes building the fat-jar and web files optional.
This also allowed me to move 'creating the release aya.zip' from verify into package - which seems more standard.

• use -P !desktop to just compile / run tests
• use mvn package to create aya.zip
• use mvn package -P web to create aya.js and aya.stdlib.js
• use mvn package -P desktop,web to do both

⚠in direct conflict with #119 (pick one)

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This also includes some opinionated changes:

• use lambdas instead of anonymous classes in AyaWeb.java
• keep the web/** files in the fat jar, since they shouldn't cause any issues.

[nick-paul]

I like matintaing the flexibility of this option over #119 also. Thanks for cleaning things up!