Efficiency table file format

!filetype    eff
!fileversion <yyyymmdd>
!filedate    <dow> <mmm> <dd> <hh>:<mm>:<ss> <yyyy> 
!material    <material name>
!eqvpath     <water-equivalent path-length>
!factor      <for signal evaluation>
[
!iscrosssection     
]
#
# comment
#
!projectile   <projectile 1>
!eff
<E/(MeV/u)> <eff>
...
!projectile   <projectile 2>  
!eff
<E/(MeV/u)> <eff>
...
!projectile   <projectile n>  
...