l10n: add plural forms for the Czech and Slovak languages
Small fixes
Fix warnings; add macros SUPPRESS_WARNINGS_START and SUPPRESS_WARNINGS_END
TestSuite: Renamed the run_test_suite binary to fgfs_test_suite.
TestSuite: remove LaRCSimMatrixUnitTests from the CTests
TestSuite: Renamed the run_test_suite binary to fgfs_test_suite.
More accurate type checking in `member` function
Remove some of the files that are duplicated in fgmeta-python