* Update expressions.md
No function reference just yet, nor text for Jython and Clojure. This will all likely be split out into multiple pages, but for now, it's all one for ease of discussion.
* Adding some functions structure for discussion
* Small tweaks
* Accept edits first, duh
* Shortening shorthands
* Update expressions.md
* Tweaks forever
* Adding table of math functions
* Typos, Clojure examples, cross() recipe
* Formatting and language
* Misc clarifications
* Splitting the pages
* Update grelfunctions.md
* Formatting + resolving comments
* Removing a table hack
* Update grelfunctions.md
* Update grelfunctions.md
* Update grelfunctions.md
* Added columnName
* Update grelfunctions.md
* Update grelfunctions.md
* Update expressions.md
* Forgot to fix some links when I split the pages
* Regex updates