Castle Constructor Alpha 2.3.1 Bug fixes and balance adjustments

We've released a small update to fix some of the issues with 2.3a and to make a few balance changes. The full change log is below.

• Fixed the treadwheel crane image
• Fixed issue with waves being beaten instantly
• Fixed issue with wining the level instantly
• Pushed back how soon shields bearers show up
• Adjusted the wave generation to spread out enemies a bit more
• Reduced the starting strength of waves
• Adjusted trap pack to have 2 Caltrops instead of 1
• Gave stone walls a bit more health
• Fixed the image in the sidebar not being set
• Fixed cases where the return to map button wasn't working
• Adjusted targetting to check for enemies more often. sections now will 'spot' and begin attacking enemies sooner after they enter their range.
• Reduced the Ballista's minimum range so it can now shoot closer targets
• Fixed murder holes being able to be activated while it is disabled.