added feature to guess the compression configuration

• if samples = 0 the cmp_tool counts the samples in the data file and uses them
• if buffer_length = 0 the 2*samples parameter is used as buffer_length
• added feature to guess the compression configuration
• some code refactoring
• added more detailed error messages
• small bug fixes

added 2 commits

• 3ef67b3d - Adaptation to the Windows environment
• fc454577 - add code feedback from Armin

Compare with previous version

mentioned in commit 6abf29f3

merged