Use tab to quickly search filenames in netrw

I want to navigate for files faster in netrw, so tab sets up the regular
expression for the beginning of the filename. (Inspired by tab
completion.)

I'd like to setup something similar for bufexplorer too (to make the
interfaces as similar as possible).
Don't add extra indents to ctor initializations

Not sure how to customize without setting all of cinoptions, so just
modify all of them directly (in the google indent file).

Add a note to my cpp ftplugin so I know how it's controlled if I go
looking again.
Reorganize perforce-david

Load commands that will work with whatever's executable. Prevents
invalid loading and allows more functionality to work if perforce.vim is
not working.
Add trick to convert registers to pointers

Add Visual Studio trick to make it easier to guess pointers from the
register window. Useful when debugging Release builds where Visual
Studio won't do it for you itself. Result is a list of possible
candidates (currently only works for x86_64).

Made it an autoload function with no command because it's infrequently
used.
sub: more snippets