Main change is that the tester1 is now overhauled.

The regression tests for rounding functions are included in the new tester1.

There used to be a few concerns in tester1 as listed below.
1. It depended on long double. On some platforms, long double is same as double, which could be problematic.
2. The testing criteria was not up to date.
3. Recently added functions were not included.
4. The code was not easy to check.
5. tester1 consisted of 4 different pieces.
Now, all of these problems are sorted out.
I still need to separate iut and tester1.

Other changes include:
* Cleanup and change in tester2 criteria for xhypot_u35
* Changes for simd sp functions were not included in the last commit. These are included in this commit.

The bugfixes not mentioned in the last commit messages are :
* Added #if defined(_MSC_VER) to vcast_d_vd
* The conditions for displaying warning messages in sleefdp.c were not correct