0.15.1.0 - Followup Balance Fixes and Bugfixes

Tweak exp gains to be more rewarding and less punishing early on, and also less crazy-powerful later on.
Fix bug where new Land Bonus insight was not having the intended effect.
Display lore on insight page as intended.
Fix crash that can happen with 'fire' manual ability when few bullets are on screen.
Fix bug where discount upgrades didn't display correct percentages in UI.
Remove redundant settings tab button.
When getting significant offline gains, reset the battle immediately so user doesn't have to wait for one battle to finish to see the exp benefit.
Make trade mechanics less harsh (get more gold per trade, and l1 market has more trade storage).
Tweak low level items to be a little more meaningful.
Tweak crit description to be a little clearer that it doesn't affect all damage done by ships, only crit shots.