Add additional functions / file types to trace

[gothub]

Prioritize for release 1:

• [ ] read.table()
• [x] read.csv()
• [x] write.csv()
• [x] scan()
• [x] readLines()
• [x] writeLines()
• [ ] netCDF files
• [x] readPNG()
• [x] writePNG()
• [x] ggsave()
• [x] dataone::getObject()
• [x] dataone::createObject()
• [x] dataone::updateObject()

These can be implemented in a future release.

• [ ] readJPEG()
• [ ] writeJPEG()
• [ ] readBin()
• [ ] writeBin()
• raster files()
• shape files()
• readRDS()
• writeRDS()
• serialize()
• save()
• load()

[gothub]

netCDF and read.table will be implemented in 1.1.0. Moving this issue to 1.1.0