The deprecation of ecc_25519_work_default_base and
ecc_25519_scalarmult_base{,_bits} is reverted, as the Ed25519 and legacy
base points are represented in the same way now.
Using uint32_t instead of unsigned int for the unpacked work struct ensures
the code is working correctly on ABIs with ints narrower than 32 bits.
While this would constitute a API/ABI change on some systems in theory,
most likely all systems using libuecc so far have uint8_t == unsigned char
and uint32_t == unsigned int.
Also, coding style cleanup.
This makes the documentation more accessible, as the header now contains
all information regarding the usage of the API, and it is not necessary to
generate the Doxygen documentation anymore for that.
In inverted coordinates there are 4 points that aren't representable correctly. Avoid this problem by using the extended coordinate representation, in which an add+double operation has essentially the same performance as in the inverted representation.
