Release candidate - 2.5

Bug fixes:

• Various memory leaks
• Revert to old behavior for some of the C++-transformation
• Stop trying to create subfolders if folder creation failed

Changes:

• Dump mapaxes even though they are not applied
• If actnum is provided programatically, do not try to load it from file
• Ignore wells with blank names
• Infer format from extension
• Use 0-based indices for nnc's.
• Throw exception if smspec key is not found
• Make it possible to skip signal handling with environment variable
• Use six elements from STARTDAT
• Make documentation build nicely
• Allow for mixed case basenames
• Reset before active cells are set