Minor adjustments and additions to pass CRAN checks

[blasee]

Hi Kathy,

Here's a summary of the main changes:

• Rename 'Data' directory to 'data'
• Remove all files from 'vignettes' except for the Rmd
• Use importFrom instead of import in roxygen comments so the NAMESPACE is less confusing
• Minor adjustments in the DESCRIPTION (note - Authors@R and Depends fields)
• Make sure all the examples work and the vignette can be compiled

Here's a few notes I made:

• I would recommend updating from reshape to reshape2 (melt and cast functions)
• Change Rd titles to title case
• getLSDSummary returns all the same values in the example. Is this OK? (example(getLSDSummary))

[blasee]

OK the merge should work now.