[BIP 39] Create catalan.txt

[fburrull]

No accents, no special characters, 4 first letters all different

[fburrull]

wordlist has the following characteristics:

a) smart selection of words

• the wordlist is created in such a way that it's enough to type the first four
  letters to unambiguously identify the word

b) similar words avoided

c) sorted wordlist method:
cat unsortedlist.txt | uniq -w 4 | sort > sortedandunambiguouslist.txt

[luke-jr]

@slush0 @prusnak @voisine @ebfull

[kallewoof]

Two violations of 4-first-letters-unique, and a duplicate pair.

badall
badar

granada
granular

incendi
incendi

[fburrull]

Corrected:
badar -> badina
granular -> grao
eliminated duplicated: "incendi"
added: inert
catalan.txt

[luke-jr]

For now, the author(s) of BIP 39 have decided not to accept any further word lists into BIP 39 itself, and encourage adding new ones to the WLIPs repo here: https://github.com/p2w34/wlips