* ninoimager.sln, ninoimager.csproj: I forgot to add them before

* Nclr.cs: Added write method
Changed structure of PMCP block
Fixed problem when palette size is 0

* NitroBlock.cs: Removed padding bytes

* Program.cs: Added test to check writing.
Updated NCLR file format

Nclr.cs: Added and fixed meaning of some fields from PCMP and PLTT block
Updated block data before writing
Print debug message