removed pInline*.h (code in ppolys.h)
remove some unused files
1. adds/brings back p_ExpVectorAddSub() which is useful in sba
2. uses p_ExpVectorAddSub() in sba
fixes wrong code indention
Merge pull request #453 from ederc/sba-optimizations

Brings back p_ExpVectorAddSub(): Used in sba
documenation: NEWS, new libs, etc.
fix: format, sum->lsum in ellipticcovers.lib