add docs

Author: 9il

index.d

@@ -24,7 +24,7 @@ $(BOOKTABLE ,
  $(TR $(TDNW $(MREF mir,lob)) $(TD Binar and Char Large Objects ))
  $(LEADINGROW Date and time)
  $(TR $(TDNW $(MREF mir,date)) $(TD Fast BetterC Date type with Boost ABI and mangling compatability))
- $(TR $(TDNW $(MREF mir,timestamp)) $(TD Timestamp ))
+ $(TR $(TDNW $(MREF mir,timestamp)) $(TD General purpose timestamp implementation with arbitrary precision ))
  $(LEADINGROW NDarrays and Algorithms)
  $(TR $(TDNW $(MREF mir,algorithm,iteration)) $(TD Mir & BetterC rework of Phobos.))
  $(TR $(TDNW $(MREF mir,algorithm,setops)) $(TD Mir & BetterC rework of Phobos.))