Define HalfMonthModifiedFollowing as business day convention
Define HalfMonthModifiedFollowing
HalfMonthModifiedFollowing update
Merge branch 'pullrequest' of https://github.com/paolomazzocchi/quantlib into newbranch
exported Half-Month Modified Following to Excel
Merge pull request #4 from paolomazzocchi/pullrequest

Pullrequest
Merge branch 'master' of https://github.com/fametrano/quantlib
fixed Half-Month Modified Following bug
switched version number up to 1.5.0
pull from fametrano master