Calculates resources cost in KSP 0.24

In KSP 0.24 all resources also have
cost = amount * price_per_unit
This update calculates cost of all resources per part and total
resources cost
Updated to the latest TacLib.

- Reorganized the directory structure so that it is no longer placed in
  ThunderAerospace.
- Added support for the KSP Addon Version Checker (AVC).
- Updated for KSP 0.25
Started adding resource info.
Merged girka2k changes and finished adding columns for resource cost plus resource mass and dry mass.
FormatValue can now optionally show the precision.
Fixed #10: prevent click-through on the GUI
Fixed #9 & #11: ignore physics-less parts.

Also ignores fuel lines, struts, and launch clamps.
Added settings to make the columns optional.
Updated Readme to show contribution by girka2k

Also added the missing license statement to Settings.cs
Bumped version number to 1.3