Update to 1.7:
Redesigned the directory-include feature to avoid using
platform-specific directory scanning code, and to fix a bug in
the handling of nested includes. The application can now do its
own directory scanning and/or wildcard expansion by registering
an include function.
* Added new CONFIG_OPTION_ALLOW_SCIENTIFIC_NOTATION to allow
either %f or %g-style formatting for floating point values.
* Improved the options APIs in both the C and C++ libraries.
* Improved the automatic conversion between int and int64 values.
* Fixed build errors caused by out-of-sync generated lexer and
parser source files.
* Added an API to clear an existing configuration.
* Fixed a problem where a group or list could be added to an array.
* Changed default float precision from 2 to 6.
* Modified grammar to allow trailing commas in lists and arrays.
* Removed logic that clipped negative values to 0 in (unsigned int)
cast operator.
* Updated manual and added a new chapter on other libconfig
implementations and bindings.
* Various internal code cleanup.
* Fixed failing unit tests.
* Upgraded VS2015 solution/project files to VS2017.
- Use new project URL
- sonum updated from 8 to 11