Added Lightning Damage Support

Adds additional lightning damage to linked skill(s).

Gem Leveling

Level	Required Level	Required Intelligence	Added Lightning Damage	Experience to Level
1	15	22	1-9	28,130
2	18			47,943
3	21	30	1-12	77,012
4	24	33	1-15	118,383
5	27	37	1-17	175,816
6	30	40	1-20	254,061
7	33			359,090
8	36			703,128
9	40			755,049
10	43			1,426,490
11	47			1,488,645
12	49	63	3-48	1,964,019
13	52			2,573,731
14	54
15	55			9,930,867
16	56	72	3-63	21,335,597
17
18
19
20

Gem Quality

Each percentage of quality adds +1% Shock duration on enemies.