add deleteDatabase as a subprop detect to indexedDB.

fixes #1227, also fixes #979
Wrapping call to `indexeddb.deleteDatabase` in a try…catch because it errors in some contexts (e.g. data URIs)
Merge pull request #1258 from stucox/indexeddbblob-trycatch

Wrapping call to `indexeddb.deleteDatabase` in a try…catch
Merge pull request #1238 from patrickkettner/deletedb

add deleteDatabase as a subprop detect to indexedDB.
Create .jshintrc file, update jshint grunt task
create .jshintrc file

create .jshintrc file

create .jshintignore

update jshint Grunt package and use .jshintrc for rules

Restore squashed authors

change language for eqeqeq as per @patrickkettner request

remove .jshintrc header

assorted fixes based on @patrickkettner review

Restore jshint ignores in gruntfile

add 2 more globals used in jshint

add node specific jshint rules for the node library

remove distmetadata file

Add distmetadata.json to .gitignore

correct spelling mistake