Fix ge_add bug
Fix ge_add test case bug, init cycle to be 0 in ge_add
slide is correct now
Make slide a function, passed test
Make slide a module

- Make slide a module, passed test
- Fix a bug in ge_add
Update slide implementation for simplified slide in C codes!
Add fe_pow22523, passed test
Add fe_pinvert, passed test
Add code for ge_frombytes_negate_vartime, NOT tested
Add fe_isnegative and passed test
Add ge_frombytes_negate_vartime, passed test
Begin work on integration
Merge branch 'verilog' into verilog_mpa2

Conflicts:
	verilog/c_ref/src/verify.c
Add preliminary code for example of embedded