o.c.scan: Table display of logged data used wrong time stamp

Table must use the most recent time stamp of all samples in a row for
the row time stamp, but used the oldest time stamp
Merge pull request #390 from ControlSystemStudio/bug389

o.c.scan: Table display of logged data used wrong time stamp
o.c.swt.xygraph: Auto-scale for log axis fix

With negative data, a log axis is strictly speaking not possible.
Instead of crashing, the Log10.log10() and pow10() are used to map
negative values to 'really small' values for the log. The pow10()
implementation now handles such a number as returned by log10().
o.c.opibuilder.editor/tools: Only one ImageIcons.decorator

Decorator for image icons which displays thumbnail of the image in the
icon was found in both the o.c.opibuilder.editor and ..tools plugins.
Kept the one in o.c.opibuilder.editor (tools depends on editor, would
not have reduced the number of dependencies to put it in tools).
While at it, added basic description to the implementation, fetch the
path 'ext' only once, and log exception to log.
Merge pull request #391 from ControlSystemStudio/bug383

o.c.swt.xygraph: Auto-scale for log axis fix
Merge pull request #394 from ControlSystemStudio/bug392

o.c.opibuilder.editor/tools: Only one ImageIcons.decorator
Merge remote-tracking branch 'upstream/master'
Fix time display. Was using 12-hour format without am/pm indication.
Make data format compatible with ISO8601.
Merge pull request #395 from MichaelRitzert/date-format-fix

Date format fix
Merge pull request #393 from ControlSystemStudio/sns

Sns
o.c.swt.widgets: Allow resources from web links with spaces

BOY Images (and *.opi files in general) didn't load if the URL contained
spaces. Need "%20" for that, but at the same time must keep the space
when loading the file locally from file system.
Merge remote-tracking branch 'origin/master' into sns
attempt to catch more than spaces
shouldn't have removed the replace space with %20
Merge pull request #402 from ControlSystemStudio/bug401

o.c.swt.widgets: Allow resources from web links with spaces
o.c.swt.widgets: Last change missed the import for URI
Merge pull request #405 from ControlSystemStudio/bug401

o.c.swt.widgets: Last change missed the import for URI
BOY: fix precision bug
https://github.com/ControlSystemStudio/cs-studio/issues/403
Merge remote-tracking branch 'origin/master' into sns

Conflicts:
	applications/plugins/org.csstudio.swt.widgets/src/org/csstudio/swt/widgets/util/ResourceUtil.java
o.c.archive.reader.rdb: Add preference for fetch_size

Original hard-coded value could result in out-of-memory error