pretty_parse fails when code is not linted. Add option to open file (#59)

Add View Context to package selection menu (#60)

`update_desc` and `makeImports` now add alphabetical imports with wrap (#69)

Fixes issue where a single chunk Rmd has the lines simplified to matrix (#67)

Load installed.packages on package load (#65)

Add ability to extract chunk names & numbers, and use in tempfile name (#58)