Add howm formatter support
Add tzinfo-data as a dependency
I need this to run mhc sync with MHC_TZINFO defined.
Merge pull request #17 from ykasap/howmformatter

Add howm formatter support
Merge pull request #18 from ykasap/tzinfo

Add tzinfo-data as a dependency
ADD user friendly error message
Add calfw formatter
Set product name to iCalendar PRODID
Overwrite on copy when sync strategy is 'mirror'
Increment sequence on mhc-draft-finish
Cosmetic change
Calendar takes default filter
Change configuration scheme
Emit grace exceptions
Update sample configuration
Add CATEGORIES and LOCATION on iCalendar conversion
Fix typo
Remove unused method
Show event if scan-range partially overlaps
Make sequence= take both String and Fixnum
Empty fields to dump empty strings