Fixes two bugs from merging in chrome.tabs.executeScript() function, issue #133 and a viability bug.
Changed chrome.extension calls into their recommended chrome.runtime asynchronous equivalents changing the Settings.getPassword() into callback form.
Removed the Settings.password entry and only use the password variable in the background page to hold the RAM/in-session password.
Consolidate clearSyncData() and Settings.clearSyncData() functions into one.
General code maintenance & cleanup.
Update to 0.7.2