This is a general maintenance and bugfix release.

Update nmap from 7.31 to 7.50

Update curl from 7.54.0 to 7.54.1

This is a security and general bugfix release. CVE-2017-9502 is
addressed.

This updates nmap from 7.31 to 7.50. The 7.50 release contains mostly
improvements to the signature database and nse scripts.

Update wine package from 2.8 to 2.10

Add dropbox package

Fix crew command to include hidden files in the archive

Add mywanip package

Add composer package

Update php7 from 7.1.5 to 7.1.6

Refactor search logic to support regex

Usage is like below.

```
$ crew search vi
(i) vim: Vim is a highly configurable text editor built to make creating and changing any kind of text very efficient.
(i) vidstab: Transcode video stabilization plugin.
vifm: Vifm is an ncurses based file manager with vi like keybindings/modes/options/commands/configuration, which also borrows some useful ideas from mutt.
(i) libxvid: The free video codec that is strong in compression and quality.
neovim: Neovim is a refactor, and sometimes redactor, in the tradition of Vim (which itself derives from Stevie).
$ crew search vi extra
(i) vim: Vim is a highly configurable text editor built to make creating and changing any kind of text very efficient.
http://www.vim.org/
version 8.0-1
(i) vidstab: Transcode video stabilization plugin.
http://public.hronopik.de/vid.stab/
version 0.98b
vifm: Vifm is an ncurses based file manager with vi like keybindings/modes/options/commands/configuration, which also borrows some useful ideas from mutt.
https://vifm.info/
version 0.8.2
(i) libxvid: The free video codec that is strong in compression and quality.
https://www.xvid.com/
version 1.3.4
neovim: Neovim is a refactor, and sometimes redactor, in the tradition of Vim (which itself derives from Stevie).
https://neovim.io/
version 0.1.7
$ crew search ^vim$ extra
(i) vim: Vim is a highly configurable text editor built to make creating and changing any kind of text very efficient.
http://www.vim.org/
version 8.0-1
```

`crew search` use to only return a single result if your query string
matched a package name exactly.

`crew search` now supports regex.

chronos@localhost / $ crew search ^lib
Found libpcap, version 1.8.1
Found libjpeg, version 9.1
Found libunwind, version 1.1
Found libxslt, version 1.1.28
Found libffi, version 3.0.13-1
Found libssh2, version 1.4.3
Found libtool, version 2.4.6
Found libpipeline, version 1.4.1
Found libevent, version 2.0.22
Found libxml2, version 2.9.2
Found libgd, version 2.0.33
Found libtiff, version 4.0.7
Found libpng, version 1.6.26
Found libsigsegv, version 2.10

  - Simplify architecture logic

Enhance crew search command

Add bcif package

Add cadaver package

removing the @@debug_symbol line that was preventing updating

github release management tools

Update from 4.11.0 to 4.12.0

Add wine

Update go to 1.8.3 and etc.

Add description and homepage metadata to packages

Add a2png package

Add ascii package

Add sfk package

Add dos2unix package

Add aws package