Fix version in configure.ac

Setup automated Windows installer build

- Upgrade vcxproj
- Retrieve dlls from build directories
- Use define for version number in Inno Setup

Bump version to 1.6.2.2

Prepare windows-only release 1.6.2.1

Update build number in Xcode

Bump build number and update copyright to 2020

Don't use celengine\starbrowser.* in VC++ build

It provides predicates defined also in celestia\winstarbrowser.*, the
conflict is silently ignored, breaking sorting in a star browser.

Add missing semicolon in shader definition (Closes: #203)

Copy latest changes to nearstars.stc from trunk