fixed issues
- tentative fix for mixture of zoom and emitPoint tools (issue#8)
- set minimum size for window to avoid overlapping widget (issue#2)
- added tentative applicaiton icon (issue#1)

updates
- use actual step count for updating build exposure progress bar
- fixed initialization bug in DialogSearchFeature
- fixed bug causing residual attribute range in buildMS dialog

license
- updated README.txt and LICENSE.txt to reflect license change to AGPL