Check for QTLRELEASE_EXECUTABLE before i18N. This was forced
by Windows build where QT doesnot have QTLRELEASE.

Updated ConfigureMonteverdi2.h.in to setup proper dllexport
and import macros based on BUILD_SHARED_LIBS option.

added export macros in required places.

ENH: Added clear/insert-all DatabaseBrowserController::UpdateTree2(); Fixed DISABLE_CUSTOM_TW_ITEM conditional code parts.

BUG: MANTIS-929 (tree-widget item disapears when dropping in OTB-App ) WORK IN PROGRES: ok on Linux 64 with Qt 4.8.1; to be tested on Windows 7 64/32.

MRG: Merged changeset 41364b042ac7 (MANTIS-929 work-in-progress fix) branch into working directory (changeset f298c157a8e7).

BUG: MANTIS-934 workaround (disable DatabaseBrowserWidget::SetCurrentDataset() when Qt version is less than 4.8.1).

ENH: Optional system to disable rendering (usefull when debugging some features while using remote-desktop connection).

BUG: MANTIS-933 (added accept drag-move event back when cursor is getting back over item-list); TRANS: Added translation for 'form'.