Add 'allow-candiates' option

[dsuchka]

• allows to include cards regardless of the 'endgame' restriction

Sometimes we have strong unfused cards (usually P2W), that can be included only when endgame value is 0 or option is omitted. However simulation takes too many time...
So, when we know own strong cards, we can simplify cards lookup and omit all unfused cards except some ones (using 'allow-candidates' option).

For instance:

tuo "Petrisis, Sleek Beamshot, Luminous Jester, Vivid Jester, Taser, Bio Equalizer, Deserted Baughe" "Steel Mutant" climb 50000 ordered endgame 1 -e Heroism fund 5000 allow-candidates "Loathe Gravewing, Taser, Duelist"
...
Optimized Deck: 7 units: $1630 2.072: Petrisis, Sleek Beamshot, Luminous Jester, Vivid Jester, Loathe Gravewing, Taser, Zorbo the Master, Bio Equalizer

VS

tuo "Petrisis, Sleek Beamshot, Luminous Jester, Vivid Jester, Taser, Bio Equalizer, Deserted Baughe" "Steel Mutant" climb 50000 ordered endgame 1 -e Heroism fund 5000
...
Optimized Deck: 7 units: $2995 0.834: Daedalus, Sleek Beamshot, Luminous Jester, Bullet Virtuoso, Zorbo the Master, Deserted Baughe, Atlantia, Dune Runner