reactive() and observe() now take expressions
Change references of reactive 'functions' to 'expressions'
Add label argument to reactive and observe
Clean up instances of reactive() and observe()
Re-roxygenize
Fix deprecation message for observe()
Add shinyDeprecated function
Make function for expr-to-function conversion
Change reactiveXX to renderXX
Update documentation for renderXX
reactivePlot: call height and width properly
Add renderXX Rd files
Export exprToFunction
Merge pull request #104 from wch/reactive-exp

Change reactive() and observe() to take expressions