v15.0.0

Changes

• Rename option --modified-date to --modification-date.
• Remove "SOURCE CODE" section from help and rewrite some parts of it.
• Transform some macros into functions.
• Use new enums, Parse_Status and Return_Status, instead of int to make function returns more legible.
• Standard library functions will now include the std namespace in all of their uses.
• Some error reports have been slightly changed.
• Add new compilation option -std=c++11.
• Add a .clang-format file to automatically format files.
• Revealing user and group will no longer use static pointers, but a buffer on the stack.