expm rewrite
added global variables declaration, removed garbage files
re-added onunload for library code
removed RNACI import, s/util/utils
updated expm documentation for removal of t param
added dsmatrix print and show methods
added all=TRUE print method for dsmatrix
markdown README
fixed apply bug
registering native routines
Merge branch 'master' of github.com:wrathematics/pbdDMAT
Merge pull request #3 from wrathematics/master

Updates