[utils#cache] Minor refactoring
[utils] Add time utility
[preferences-user-rulesets] Faster rules list update
(for #46)
[prefs] Unicode support
[preferences-user-rulesets] Internationalized domain name support (for #4)
[updating] Add updating utility
[ruleset/{code-ruleset, persistent}] Add unicode strings support
[prefs] Add `delete` method
[updating] Fix version comparison
[ruleset/persistent] Proper cleanup when updating from 0.12
[request-info] Tag unknown schemes as such
[rulesets/default] Allow documents from unknown schemes
(fix #49)
[bootstrap, updating] Get current version from AddonManager
[popup] Highlight rule-row on hover (close #51)
[ruleset/persistent] Save after updating from 0.12
Bump version to 0.13
[README] Add link to the latest version
Merge pull request #5 from futpib/master

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