minimal optimization=simplification: all getRowSpan nd getColSpan calls are getSpans() calls underneath anyway so call that one directly when we use all info from that one anyway.
fixed the performance measurement pages to load properly and augmented the model.benchmarks.html page to print the timing results in the page itself (including init timings) instead of to the debugger console.
LinkFomatter: fix obvious merge bugs
another obvious merge bugfix and some JSHint happiness
bit more work to unify the performance test pages
updated README.md to better describe current state of affairs of this repo and branch