Add zeus plugin

Includes aliases for zeus (https://github.com/burke/zeus)

Also there is a README.md that list all aliases, ready to copy
into the wiki.

plugins/zeus/README.md

+## zeus
+**Maintainer:** [b4mboo](https://github.com/b4mboo)
+
+* `zi` aliases `zeus init`
+* `zinit` aliases `zeus init`
+
+* `zs` aliases `zeus start`
+* `ztart` aliases `zeus start`
+
+* `zc` aliases `zeus console`
+* `zonsole` aliases `zeus console`
+
+* `zsr` aliases `zeus server`
+* `zerver` aliases `zeus server`
+
+* `zr` aliases `zeus rake`
+* `zake` aliases `zeus rake`
+
+* `zg` aliases `zeus generate`
+* `zenerate` aliases `zeus generate`
+
+* `zrn` aliases `zeus runner`
+* `zunner` aliases `zeus runner`
+
+* `zcu` aliases `zeus cucumber`
+* `zucumber` aliases `zeus cucumber`
+
+* `zt` aliases `zeus test`
+* `zest` aliases `zeus test`
+
+* `zu` aliases `zeus test/units/*`
+* `zunits` aliases `zeus test/units/*`
+
+* `zf` aliases `zeus test/functional/*`
+* `zunctional` aliases `zeus test/functional/*`
+
+* `za` aliases `zeus test test/units/*; zeus test test/functional/; zeus cucumber`
+* `zall` aliases `zeus test test/units/*; zeus test test/functional/; zeus cucumber`
+
+* `zsw` aliases `rm .zeus.sock`
+* `zweep` aliases `rm .zeus.sock`

plugins/zeus/zeus.plugin.zsh

+# Some aliases for zeus. (See: https://github.com/burke/zeus)
+# Zeus preloads your Rails environment and forks that process whenever
+# needed. This effectively speeds up Rails' boot process to under 1 sec.
+
+# Always use bundler.
+# Rails depends on bundler, so we can be pretty sure, that there are no
+# problems with this command. For all the other aliases I provided an 
+# alternative, in case people have conflicts with other plugins (e.g. suse).
+alias zeus='bundle exec zeus'
+
+# Init
+alias zi='zeus init'
+alias zinit='zeus init'
+
+# Start
+alias zs='zeus start'
+alias ztart='zeus start'
+
+# Console
+alias zc='zeus console'
+alias zonsole='zeus console'
+
+# Server
+alias zsr='zeus server'
+alias zerver='zeus server'
+
+# Rake
+alias zr='zeus rake'
+alias zake='zeus rake'
+
+# Generate
+alias zg='zeus generate'
+alias zenerate='zeus generate'
+
+# Runner
+alias zrn='zeus runner'
+alias zunner='zeus runner'
+
+# Cucumber
+alias zcu='zeus cucumber'
+alias zucumber='zeus cucumber'
+
+# Test
+alias zt='zeus test'
+alias zest='zeus test'
+
+alias zu='zeus test/units/*'
+alias zunits='zeus test/units/*'
+
+alias zf='zeus test/functional/*'
+alias zunctional='zeus test/functional/*'
+
+alias za='zeus test test/units/*; zeus test test/functional/; zeus cucumber'
+alias zall='zeus test test/units/*; zeus test test/functional/; zeus cucumber'
+
+# Clean up crashed zeus instances.
+alias zsw='rm .zeus.sock'
+alias zweep='rm .zeus.sock'