Add pre-built binaries

enable shared library and some enhancement.

* [gcc7] add symbolic links, recompile packages

* Update gcc7.rb

Fix symbolic links

Fix #2121

* add unified xor protocols and recompile the related packages

* Update libxdmcp.rb

remove dependency

Update libwebp and graphicsmagick packages

Remove extraneous dependencies already included from other dependencies

* [texinfo] add pre-built binaries

* Update texinfo.rb

* [pkgconfig] Recompile binaries

Reconfigure system-include-path and system-library-path for different architectures.

* Update pkgconfig.rb

* [gcc7] minor change, add gcc4-compatible option

* Update gcc7.rb

* Update gcc7.rb

Fix installation process

* Update gcc7.rb

Update core packages a-u

Add alive package

Add pre-built binaries for packages c-s

Add cf package

Add missing dependencies in php packages

Add snort package

Add libdnet package

Add daq package

Add rack package

Need to go get before go build

Add bash command completion support

Update php packages

Add new packages to core_packages.txt

* Create dejagnu.rb

* Update dejagnu.rb

Correct homepage

* Update dejagnu.rb

* [texinfo] remove binaries

Version mismatch with perl, need recompilation

* Update texinfo.rb

* Add used disk space to the files command

* Use the filelist variable

* Simplify the disk usage message

remove buildessential to prevent dependency loop, add libuv as dependency, fresh build have been performed.

When I read this the first time, I didn't see anything on the given page telling me anything about crew. Finally I realized that although the instruction was in a separate paragraph, it didn't expect me to have already gotten in to dev mode.
This way of phrasing it should help people know what they're looking for on the wiki.