add scientific justification for isogal sims

Use perceptually uniform colormaps for Figs. 8, 13, 15

Add the subsection 4-5 "Discussion on scalability

Respond to Nathan's comments

Following the N-rules (two dashes) suggested by MNRAS

respond to justin's comments

Proofreading pass from Nathan

Add all figures and the compiled draft

Add fig__KH_grid.pdf

Minor revision of the entire manuscript

Add author list, acknowledgement, and keywords

Fix typos

Revise title and add abstract

Finish the summary section

Add a few paragraphs in the discussion section

Finish the introduction section

Add one paragraph in the introduction

Add the table summarizing the differences between gamer-1 and gamer-2

Finish the section of memory management

Add two paragraphs about memory pool