[Feed] Add Feed Info capability

Add capability for providing information about a
data feed not already included in the FeedProvider
interface. This provides groundwork for MCT-3881
without making incompatible changes to API.
[Feed] Bump API version

Increase API version to reflect usage of new
capability for MCT-3881.
[Plot] Add setting to store feed type

Add setting in which a user's selected feed
type might be stored, for MCT-3881.
[Plot] Add logic for choosing data feed type

Add logic for selecting a matching feed provider
for a plot based on settings for its data type
as well as for its time system, for MCT-3881.
[Plot] Add retrieval method for feed info

Add method to plot for retrieving all feed info
available for all visible objects in a
consolidated data structure. This will permit
populating a drop-down menu for these choices
in order to provide a UI element for MCT-3881.
[Plot] Add plots back into Eclipse launch

Add plot plugin back into Eclipse launch, to
ease development of MCT-3881 (and because
it should not have been removed to begin with.)
[Plot] Add missing license headers.
[Plot] Add combo box for feed type selection

Add combo box to select the type of feed to
be used for plotting, for MCT-3881.

Additionally, remove some unused code in the
same file to clear out warnings.
[Plot] Show tooltips on axes

Show tooltips on axes when they have a
time system or feed type specifically
associated with them, for MCT-3883.

Note that this currently interferes
with time sync line, and uses wrong
string for feed type (uses symbolic
identifier instead of human-readable
name.)

Additionally, remove some unused code,
imports.
[Plot] Re-dispatch axis mouse events

Re-dispatch mouse events on axes when
tool tips have been attached, for
MCT-3883. This ensures that features
such as time sync line remain functional
even after tool tips are added.
[Plot] Merge in multi-feed support with incoming

MCT-3881 and MCT-3883 (merged with existing
changes in incoming for MCT-3886)
Merge pull request #300 from VWoeltjen/MCT-3883merge

[Plot] Add user interface for switching between data streams