whitespaces and refactor
Deal well with the absence of previous version
hush warning
changelog
Fixes #3
v0.2.2

 [BUG FIXES]
 - Custom version formats didn't work on  first version. (GH#3, Csson)

 [STATISTICS]
 - code churn: 3 files changed, 21 insertions(+), 17 deletions(-)