Update modlist info (#5)

Rebranding changes for Omnifactory Edition:
* Add new Omnifactory Edition icon
* Update mcmod.info:
    - change links to our project,
    - add Omni Devs names to authorsList,
    - use the new icon, and
    - update description a bit.
* Add pack.mcmeta to enforce pack format 3, and rename lang files to lowercase to comply with standards

Author: Exaxxion

…/assets/extendedcrafting/lang/en_US.lang …/assets/extendedcrafting/lang/en_us.langsrc/main/resources/assets/extendedcrafting/lang/en_US.lang renamed to src/main/resources/assets/extendedcrafting/lang/en_us.lang src/main/resources/assets/extendedcrafting/lang/en_US.lang renamed to src/main/resources/assets/extendedcrafting/lang/en_us.lang

@@ -1,16 +1,13 @@
 [
 {
   "modid": "extendedcrafting",
-  "name": "Extended Crafting",
-  "description": "Adds some new ways to craft items, as well as extra crafting items and utilities.",
+  "name": "ExtendedCrafting: Omnifactory Edition",
+  "description": "Adds some new ways to craft items, as well as extra crafting items and utilities.\n\nContinued support for 1.12.2 provided by OmnifactoryDevs.",
   "version": "${version}",
   "mcversion": "${mcversion}",
-  "url": "https://minecraft.curseforge.com/projects/extended-crafting",
-  "updateUrl": "",
-  "authorList": ["BlakeBr0"],
-  "credits": "SpitefulFox for Avaritia which some of this mod is based off of, and where the Singularity texture comes from; and ForbiddenMagic, where the Nether Star Block texture comes from.",
-  "logoFile": "",
-  "screenshots": [],
-  "dependencies": []
+  "url": "https://www.curseforge.com/minecraft/mc-mods/extended-crafting-omnifactory-edition",
+  "authorList": ["BlakeBr0", "ALongStringOfNumbers", "Eutropium", "Exa4096", "notmywing"],
+  "credits": "BlakeBr0 for ExtendedCrafting.\n\nSpitefulFox for Avaritia which some of this mod is based off of, and where the Singularity texture comes from; and ForbiddenMagic, where the Nether Star Block texture comes from.",
+  "logoFile": "assets/extendedcrafting/textures/icon.png"
 }
 ]

…/assets/extendedcrafting/lang/ru_RU.lang …/assets/extendedcrafting/lang/ru_ru.langsrc/main/resources/assets/extendedcrafting/lang/ru_RU.lang renamed to src/main/resources/assets/extendedcrafting/lang/ru_ru.lang src/main/resources/assets/extendedcrafting/lang/ru_RU.lang renamed to src/main/resources/assets/extendedcrafting/lang/ru_ru.lang

@@ -0,0 +1,6 @@
+{
+	"pack":{
+		"pack_format":3,
+		"description":"ExtendedCrafting: Omnifactory Edition"
+	}
+}