more variable naming consistency
simplify use()

Drops unnecessary local var usage and simplifies negation logic.
usev: drop '!' use flag prefix if it exists

Matches pms expectations that the flag name should be echoed and the
negation character is not part of the flag name.
give the package.provided virtual repo a 'provided' repo_id

This fixes the error where the portage verbose formatter wants to show
a repo_id for pkgs but none exists for provided pkgs.
pinspect: wrap default variable output in quotes

This way they can be eval-ed or similar in an easier fashion.
pinspect: add unmasks, bashrcs, keywords, and accept_keywords profiles subcmds

In addition, drop implemented commands from todo list.
lint: clean up indentation and whitespace in profiles
textwrap.dedent namespace import consistency
ignore 2to3 cache files
doc: add news symlink
pquery: remove vdbs usage

We just use the vdbs from domain.
pquery: remove --vdb option (use --repo vdb)

Trying to simplify redundant options.
eapi6: initial EAPI 6 profile stub
eapi6: initial get_libdir implementation

Basically a renamed version of the internal implementation.

X-Gentoo-Url: https://bugs.gentoo.org/show_bug.cgi?id=463586
eapi6: initial eapply implementation (todo)

X-Gentoo-Url: https://bugs.gentoo.org/show_bug.cgi?id=463768
eapi6: initial eapply_user implementation

X-Gentoo-Url: https://bugs.gentoo.org/show_bug.cgi?id=475288
eapi6: initial PATCHES support in src_prepare

X-Gentoo-Url: https://bugs.gentoo.org/show_bug.cgi?id=463692
eapi6: mark dohtml as deprecated
eapi6: ban einstall

X-Gentoo-Url: https://bugs.gentoo.org/show_bug.cgi?id=524112
eapi6: econf passes --docdir and --htmldir args

X-Gentoo-Url: https://bugs.gentoo.org/show_bug.cgi?id=468202