This patch implements the rest of the skills for the new skill system, adds skill retraining, adds new icons (military stance, outsider attitude, & more planet enhancements), and fixes a few other more minor issues.

0.814 change list:

* can now retrain skill points with Cortex (and other races) retrain ability
* fixed per attribute bonuses on base skills, much lower now since they are additions now instead of replacement values, should now be close to what they were pre-skill system (HoboElf)
* added 4 military stance icons
* added 5 outsider attitude icons
* added 4 planet enhancement icons
* implemented Talon Control skill
* implemented Infinite Beam skill
* implemented Vanish skill
* implemented Overload skill
* implemented Juggernaut skill
* implemented Hologram skill
* implemented Personal Escape Suit skill
* implemented Energy Flow skill
* implemented Holographic Defense skill
* implemented Escape Artist skill
* implemented Last Chance skill
* implemented Deflection skill
* implemented Ambush skill
* implemented Extended Shields skill
* implemented Fighter Siphon skill
* implemented Neutron Burst skill
* implemented Overload Transfer skill
* implemented Energy Transfer skill
* implemented Mine Targeting skill
* fighters now have shields equal to their structure (which basically means they now have 2X health)
* fixed Nanomite Cloud showing wrong numbers at skill level higher than 1 (Dalwin/DysDaemoN)
* fixed Nanomite Cloud not working on player ship (Dalwin/DysDaemoN)
* fixed swarmProjectilesExtra value (was set as a bool instead of a float)
* added skill increase sound
* changed Elusive to Vanish
* added a more generic hasAbility/providesAbility system
* changed PROTOCOL_VERSION to 93