Work on Tree for fragmentation levels, handling the complexities of multiple cleavages (MS(n))
added convenience rake methods
added convenience rake methods
Merge branch 'master' of github.com:ryanmt/msplinter

Conflicts:
	Rakefile
Merge branch 'master' of github.com:ryanmt/msplinter

Conflicts:
	Rakefile
Merge branch 'master' of github.com:ryanmt/msplinter
added a method for writing fragments to mgf files.
working on the paocc rule to enable phosphate chemistry
fixing double frag methods