Reorder DB Connection Dialog

Reorders the fields in the DB connection dialog to put the host to
connect to first, then username, password, database name, and DB
type. Fixes issue listed in GUI/TODO.

Changes:

 * src/GUI/TODO
 * src/GUI/db_connection_dialog.ui
Add Qt Resource Support to GUI

Adds support for the Qt resource system, which will be used to
replace the image collections in the .ui files.

Changes:

 * src/GUI/perftrack.qrc: New Qt resource file. Includes resource
   entries for all the icons used.
 * src/GUI/CMakeLists.txt: Adds CMake code to generate the C++
   code that implements resource support and link it to the app.
Recover PNG Resources

Recovers PNG resources from the image collections in .ui files and
saves them to actual PNG files.

Changes:

 * addparam32x32.png: Recover from .ui file.
 * attributequeryicon16x16.png: Recover from .ui file.
 * filtericon32x32.png: Recover from .ui file.
 * graphicon32x32.png: Recover from .ui file.
 * newqueryicon32x32.png: Recover from .ui file.
 * openicon.png: Recover from .ui file.
 * printicon.png: Recover from .ui file.
 * saveicon.png: Recover from .ui file.
Use PNG Resources Over XPM

Switches the resources in the resource file to use PNG versions
instead of XPM to save space. Deletes old XPM files.

Changes:

 * perftrack.qrc: Switch all XPM resources to PNG versions.
 * addparam32x32.xpm: Deleted.
 * attributequeryicon16x16.xpm: Deleted.
 * filtericon32x32.xpm: Deleted.
 * graphicon32x32.xpm: Deleted.
 * newqueryicon32x32.xpm: Deleted.
Update UI Files to Use Resources

Updates all the .ui files with embedded image colletions to use the
corresponding image resources from the resource file.

Changes:

 * column_data_dialog_base.ui
 * data_filter_dialog_base.ui
 * plot_data_dialog_base.ui
 * pt_main_window_base.ui
 * resource_selector_base.ui
 * selection_dialog_base.ui
Operator Selection Dialog Signals / Slots

Set up the operator selection dialog's signals and slots, which
went missing at some point, redering the dialog broken.

Changes:

 * src/GUI/select_operator_dialog_base.ui
Merge branch 'master' of https://github.com/heathharrelson/PerfTrack into ui-fixes-2013-08-13