new test case: numbers in categories
fix handling of number categories
adjust tests to new test post
ensure number category is NOT included as fixnum
warn on use of deprecated "server_port" option
copy over deprecated config option to new one
always be polite to the user :)
Turn off relative permalinks on Jekyll docs.
Merge pull request #1084 from maul-esel/deprecate-old-config

Deprecate old config 'server_port'
Update history to reflect merge of #1084
Merge pull request #1078 from maul-esel/fix-num-category

Fix number category
Update history to reflect merge of #1078