add many words, such as "deobfuscate", "serializable", "repurpose", etc. to the dictionary.

[isaiahshiner]

Been using cSpell for a while, and I've got a bunch of words in my user dictionary.
If you tell me the process, I can make a pull request with these, and some of the other words people have suggested in the issues. I'm not sure I agree with #181 for "ethereum", or "mempool", but "cryptocurrency" should definitely be a word.

arborescence
dataset
datasets
deobfuscate
deobfuscated
deobfuscates
deobfuscation
deobfuscator
deobfuscators
deregister
deregistered
queryable
recurse
recursed
recurses
recursing
reddit
reddit's
repurpose
repurposed
repurposes
repurposing
serializable
subreddit
subreddit's
unregister