tried to make some performance enhancements
Basic quantity chart mockups complete
Real time quantity chart is working
selected a column width for the charts
margins added to the graphs
Fixed a margin

Fixed tooltip
Switched the Real Time player to the server push method in https://vaadin.com/book/vaadin7/-/page/advanced.push.html
Added dummy data to the charts so that they'd be filled with bogus (zeros) values initially
Corrected the layout for buy/sell window
Added a grid layout to show the portfolio
Added the setupPortfolioTable method
Added margins and tried to create a proper layout
portfolio table added
closes #44
Adjusted the layouts
Fixing layouts
Merge branch 'chartPerf'