Initial stab at parsing highdim data

This code just parses a sample .protobuf file and is not properly packaged
or anything. It should be moved to the right place and named in according
to existing conventions.
changes to make it run
Basic working parser

The basic parser is now working and converts a protobuffer stream to
a data frame.
small typo
*work-around to fix int64 variable issue (is only done if int64 variables cannot be read)
*start with adjustments to be able to read highdim data of type GENERAL
Adaptations of the R code. It should now be able to read data of the type GENERAL from a file connection and turn it into a dataframe.
Suggestions for further improvements are included in the file.
Next: adjust it so that it can retrieve get data from the transmart server (write functions that the user can use to get the data), put it in R package, test with large dataset (with more than 2 different patients/samples)...
Changed server baseUrl to contain http and /transmart
Added option for fetching binary data from server
Removed unnecessary header fields
Updated methods to use correct accept.type with server request
Added getHighdimData method

This method still needs some cleaning up
Added highdim.proto in correct subdirectory of package
Previous highdim script no longer needed
Split up devCommands into seperate script files

Each of these should now have a clearer purpose
And updated README to reflect previous change in devCommands
Fix. Send authentication token with binary server request
Increased highdim parsing speed

Also added some user feedback about status of data retrieval
changed parsing algorithm for new format of protobuf file.
added return of biomarker info, when biomarker information is available.
added option to read from a binary file instead of a stream.

To do:
*  data size bug: opening en closing connection per message will avoid this issue.
* optimise script, by reading peace by peace from stream, instead of first taking in all bytes at once.
* add exploratory call
* test using the connection with the server (now only tested on local file)
* ...
New protobuf file samples
Speed up parsing using a dynamic resizing list

Implement a bare bones dynamic list so we can collect the high dimensional data rows without
suffering from a quadratic number of memory copies and corresponding slowdown.

Also some other small parser changes.