Merge pull request #6 from wltrimbl/syntaxupdate

Syntaxupdate
Added empty file
Whitespace cleanup in kmer-tool2
Mention untested with jellyfish 2.0
Whitespace cleanup
Tidying + comments
Separated subroutines into ksatools module
Post-separation cleanup
Added test invokation to retrieve MGR data
Added exception types
one more test case
Removed needless return value from calccumsum
More specific exception type
More generic makefile rules
Moved one subroutine to ksatools
Expanded docstring
Starting to separate makegraphs into subroutine
Switched from views to argsort
Removed sortbycp subroutine; one line
Moved makegraphs to ksatools