Merge pull request #16 from kevinushey/master

Make sure we write character vector bits/bytes in the correct order
Update README.md

Just a typo, and testing the editing function of github. Cheers, Johannes
Merge pull request #17 from jranke/patch-1

Update README.md
Find internal C source code.
Fix thinko
Extract sexp_type function
Add mem function
Add mem_change function
Fix example typo
First pass at object_size
First pass at ignoring duplicates
Fix str/charsxp sizes
Compute size of environments
Better environment strategy
Replace tabs with spaces
Also exclude globalenv.
These should really only apply if we've already recursed once
Remove NSE version of object_size
Remove poor test for package
Make tests more formal
Take into account current environment