Initial skeletons for CNode and MNode classes in native R.
Update description to import httr, and update authorship
Initial exports for CNode and MNode classes.
Added stubs docs for MNQuery services.
Initial implementation of getCapabilities(). Incomplete checkpoint.
Fix formatting errors in DESCRIPTION file.
Remove Maintainer, as its now redundant with Authors@R entry.
Initial infrastructure for writing 'testthat' tests.  To run, load library(devtools), and then run test().  See testthat for more options on how to run tests. Tests go in inst/tests.
New tests for MNode class, including getCapabilities().
Fleshed out getCapabilities(), and added slots in MNode for node properties that are likely desirable.
Removed debugging print() call.
Added implementation and tests for MN.get(), but only via public access.  Still need to add authentication support.