Codex CSM changes

V100 changes
Reworked the Marks for units using Chaos Icons.
Reworked the Chaos Icons.
Fixed costing issues on the Chaos Icons.
Closes #531

Ver 101 changes
Fixed a few stat modifiers that did not link correctly to the new marks
Black Legion Changes

Added further Forgeworld models (not currently able to select in the
Roster Editor).
Dark Eldar - Supplement - Haemonculus Covens

Fixed bug #538
Crimson Slaughter changes

Profile Overhaul: Altered the Chaos Lord and Chaos Marine entries.
Corrected chapter master profile, closes #541
Corrected chapter master profile #541

Also added option to hide extra characters
Leman Russ Sponsons

Corrected the rest of the profiles for the Leman Russ Plasma Cannon
sponson
Tau + Farsight Enclave: Hammerhead, FW weapon

Forge world weapon marked with [FW]
Adding rules and Tyrannocyte options for Hierodules

Adding rules description and Tyrannocyte options for Hierodules
Added dataslate rules + bugfix

Added rule descriptions for the three dataslates and fixed bug #542 from
BSData/wh40k (Hit and run missing from manufactorum genestealer
formation)
Merge pull request #544 from Jery77/master

Tau + Farsight Enclave: Hammerhead, FW weapon
Merge pull request #547 from arnestig/master

Adding rules and Tyrannocyte options for Hierodules
Bugfix update for #548
Chaos bugfixes

Changes to Plague Marines, Obliterators, Rhinos, Land Raiders and
Forgefiends. Comprehensive details are listed in #552