Created WorldEdit + FAWE mask list (markdown)

WorldEdit---FAWE-mask-list.md

@@ -0,0 +1,56 @@
+# Masks
+A mask is a restriction on an edit e.g. only replace blocks below stone. Global masks apply to all edits, brush masks apply to just the current brush.
+#### `//gmask [mask]`
+Perm: `worldedit.global-mask`
+Desc: Set the global mask
+#### `//mask [masks...]`
+Perm: `worldedit.brush.options.mask`
+Desc: Set the brush mask (separate multiple masks by spaces)
+
+## List of masks
+#### Simple masks
+`#existing`: Allow any non air blocks    
+`#solid`: Allow any solid block    
+`#selection`: Restrict to current selection    
+`#dselection`: Same as `#selection`    
+`#xaxis`: Restrict to initial x-axis    
+`#yaxis`: Restrict to initial y-axis    
+`#zaxis`: Restrict to initial z-axis    
+`#id`: Restrict to initial id    
+`#data`: Restrict to initial data    
+`#iddata`: Restrict to initial id and data    
+#### Block mask `[blocks]`
+Example: `stone,wood`        
+Explanation: Allows any block which is already stone or wood
+#### Angle mask `/[min],[max]`    
+Example: `/-20,-5    
+Explanation: Allows any block where the adjacent block is between 20 and 5 blocks below
+#### Radius mask `{[min],[max]`    
+Example: `{5,20`    
+Explanation: Restricts blocks to within a specific radius range of the initial block
+#### Adjacent mask `~[pattern]`    
+Example `~stone,wood`    
+Explanation: Allows any block if it is adjacent to stone or wood
+#### Below mask `<[pattern]`    
+Example: `<stone`    
+Explanation: Allows any block directly beneath stone
+#### Above mask `>[pattern]`    
+Example: `>stone`    
+Explanation: Allows any block directly above stone
+#### Biome mask `$[biome]`    
+Example: `$FOREST`    
+Explanation: Restricts to the specified biome
+#### Random mask `%[chance]`    
+Example: `%34`    
+Explanation: 34% chance any block is allowed
+#### Negate mask
+Example: `!<stone`    
+Explanation: Can negate any mask, this will allow any block not below stone
+#### Expression mask `=[expression]`
+Example: `=abs(z+1)%2-abs(x)%2`    
+Explanation: Restricts to blocks where x and z coords are even numbers.
+
+## Registering a mask through the API
+```Java
+FaweAPI.registerMask(yourCustomMask);
+```