This commit mainly introduces an almost-normal sysroot where the
compiler and libs will be installed. This is done in order to properly
build libstdc++-v3 from the GCC tree while also cleaning up the
slightly chaotic current install system.
* Add an `fxsdk --version` command
* Redo the README like a translation of the French topic
* Up default project to gint 2.9 to help get migrations right
* Add new `fxsdk path` command reporting important folders
* Add new CMake variables FXSDK_SYSROOT, FXSDK_INCLUDE, FXSDK_LIB so
CMake can access the information of `fxsdk path`
* fxSDK is now in charge of removing the entire sysroot including the
cross-compiler
* Add a LICENSE file
Version 3.15 introduces the <PREFIX>_KEYWORDS_MISSING_VALUES of the
cmake_parse_arguments() function, which is used in generate_g1a() and
generate_g3a(), so there is no way to bring it further down for free.
* Add the CMake build system
* Use CMake as the default for new projects
* Change [fxsdk new] but continue supporting the previous signature
* Automatically configure in [fxsdk build-fx] and [fxsdk build-cg]
* Improve help screen
Lephenixnoir