i. Changed access specifier on casemodule.Case.addImage() to public, so other modules can access it
   to display a newly added image in the UI.
ii. Fixed the names of icons in HTML report to go with the recent renaming of some Web artifacts.
Possible solution for IllegalStateException due to redundant associateLookup() calls
Eliminated redundant calls to assocaiteLookup() in DataResultTopComponent
Make HTML report more robust with artifact names in the HTML and icon files.
Removed 24x24 version of 'New Case' icon
Merge pull request #255 from rcordovano/explorer_lookup_fix

Eliminated redundant associateLookup() call in DataResultTopComponent.componentOpened().
Merge pull request #252 from raman-bt/master

i. Changed access specifier on casemodule.Case.addImage() to public, so ...
Fixed hang when report is generated with RAW_TOOL_OUTPUT
Merge branch 'master' of https://github.com/sleuthkit/autopsy
Added persistence of tag names across cases
Corrected mistake in local variable name in Tags.java
Merge pull request #256 from rcordovano/persistent_tags

Added persistence of tag names across cases
Updated splash and about dialogs
Merge remote-tracking branch 'upstream/master'