load_raw_data: Load Raw Data
In mguevara/rescinnet: Research, Science and Innovation Networks

this function read a folder and import raw data to a dataframe. It automatically finds separator.

1 2	load_raw_data(n = -1, path_raw_files = "data_raw", col_classes = NaN, sep = NaN)

`n`	Number of lines to use- -1 implies all the lines
`path_raw_files`	A path to local files where the files with data are located
`col_classes`	A vector with configuration of what column to read and of what type. Use factor for IDs or labels and NA for default numeric values
`sep`	A separator for columns in raw files. If NaN, an automatic process will be conducted to detect the separator.