widget upgrade notice

adds upgrade notice (and check) for upgrade to 1.1 due to changes in
widget construct that require re-saving
rebuild property search widget

updates query logic, adds transient caching, updates input sanitation,
and corrects index notices on saved terms
multiple updates

updating multiple files
updated taxonomy ID sanitation

switched from sanitize_title_with_dashes to sanitize_key which removes
other special characters
secondary taxonomy ID check and alt price meta

does a secondary check on the taxonomy ID to ensure it isn't empty after
sanitation and adds a alternate price field stored as a floatval to be
sorted.
fixed edit link from taxonomy page

fixed edit taxonomy link when clicking taxonomy name
Merge pull request #8 from norcross/develop

Plugin updates and refactoring