Allow null strings as header value
Change record-id format to use UUID
Change file name format from [0-9]+ to {RECORD-ID}.mhc
Add new headers Mission-Tag and Recurrence-Tag
Allow YYYYMMDD-YYYYMMDD style in X-SC-Day header
Speedup by eliminating unnecessary funcall
Set default value of recurrence tag
Adjust indent
Cache the result of mhc-db-scan on creating mini calendars
Add comments about RECURRENCE-TAG structure
Add new command framework to support ``mhc SUBCOMMAND'' style
Remove old README files
Remove old install scripts
Remove Palm support
Set default repository directory
Ignore some files created by configure.rb
Configure-scripts to work with current version
Rewrite core library and delete unused commands
Do not take "2nd May" for "2 May"
Support YYYYMMDD-YYYYMMDD style in X-SC-Day field