Adds J2-X Engine Config for RLA's J-2 (Albatross)

Information obtained from http://www.nasa.gov/pdf/214593main_Bouley%28Lamm%292-26-08.pdf
-max thrust
-min thrust (secondary mode PC)
-Isp

Information obtained from http://www.nasa.gov/pdf/528269main_J-2X_Facts2011.pdf
-confirmation that "secondary mode PC" was the minimum thrust (82% nominal). Look under the capabilities section.

Information obtained from http://www.rocket.com/j-2x-engine
-fuel/oxidizer ratio
Corrected the fuel/oxidizer ratios.

They turned out to be the exact same as all the others.
GIves J-2X 8 Restarts, Leaving the Rest Alone
Set rest of configs to 3 ignitions
Merge pull request #68 from JandCandO/patch-2

Adds J2-X Engine Config for RLA's J-2 (Albatross)