rppa.load: Load a RPPA slide from MIRACLE
In NanoCAN/Rmiracle: MIRACLE R package

This function loads a RPPA slide from MIRACLE using one of the following as input: a connection object obtained with rppa.authenticate together with either barcode or slideIndex or a securityToken where user authentication is completly omitted. In addition we need to specify MIRACLE's URL as baseUrl, specify signal filter options and optionally correct for block shifts in the process.

rppa.load(connection = NULL, barcode = NA, slideIndex = NA,
  securityToken = NA, baseUrl = "http://localhost:8080/MIRACLE/spotExport/",
  filter.diameter = T, filter.neg.values = T, filter.flag = T,
  apply.shifts = T)

`connection`	RCurl connection object obtained through `rppa.authenticate`
`barcode`	Barcode of the slide
`slideIndex`	Database ID of the slide in MIRACLE
`securityToken`	UUID of the slide used for secure access without `connection`
`baseUrl`	URL pointing to the spotExport controller of the used MIRACLE instance
`filter.diameter`	if true filter spots with diameter > 200 (set to NA)
`filter.negative`	if true filter negative values (set to NA)
`filter.flag`	if true filter flagged values, e.g. where flag property is not 0 (set to NA)
`apply.shifts`	if true apply horizontal and vertical shifts

baseUrl <- "http://192.168.0.1:8080/MIRACLE/spotExport/"
conn <- rppa.authenticate(user="mlist", password="xxx", baseUrl=baseUrl)
rppa.load(connection=conn, slideIndex=1, baseUrl=baseUrl)
rppa.load(connection=conn, barcode="ABCD")
rppa.load(securityToken="abcd-xzft-djfk-2345")