Update readme file

Author: devatrun

.gitignore

@@ -30,3 +30,6 @@
 *.exe
 *.out
 *.app
+
+# Svn
+.svn

README.md

@@ -80,3 +80,4 @@ constexpr type_t muldiv(const type_t& value, const type_t& multiplier, const typ
 ## Limitations
 * Although all methods and functions are defined using the constexpr qualifier, due to the limitations of C++ 17, working completely at compile time is only possible for code without instrinsics, since there is no implementation of [std::is_constant_evaluated()](https://en.cppreference.com/w/cpp/types/is_constant_evaluated) in the standard before C++ 20.
 * The design of long integers tries to completely repeat the behavior of native integers, but still differs. For example, the propagation of integer types always occurs from a signed integer to an unsigned integer, and an implicit conversion from a larger integer to a smaller integer does not cause a warning, but a compilation error.
+* Location of digits always corresponds to little-endian, regardless of the platform, which should be taken into account when serialization/deserialization. The digits themselves are always in platform natural order.