cleaning/deduplication of tags

[arademaker]

#split (19)
#need2split (3)

#sport (6)
#sports (7)

#us_only (2)
#usa-only (4)
#en-only (12)
#en-only? (2)
#en_only (112)
#en_only? (14)
#enonly (4)

@claudia (2)
@claufreitas (2)

@fabricio (2)
@fbcr (1)
@fcbr (21)
@fchalub (1)

@livy (417)
@livyreal (42)
#livy (12)

@vcvp (3)
#vcvp (13)
@vcvpaiva (161)

#PWN (3)
#pwn (10)

#repetido (4)
#same (8)
#sameas (20)

#PWNerro? (3)
#PWNerror (11)
#pwn-erro (2)
#pwn-error (19)
#pwn-error? (2)
#pwn_bad (4)
#pwn_error (7)
#erro (3)

#pwn-missing (2)
#lack (153)
#lack? (34)

#bad_gloss (5)
#bad_gloss? (3)
#badgloss (3)
#pwn-bad-gloss (4)
#glosa (45)

See also #144