Add support for ScriptAliasMatch directives

Much like in PR #483 extend the _scriptalias.rb template so that the
`scriptalias` parameter in `apache::vhost` can contain `aliasmatch`
hashes which get translated to `ScriptAliasMatch` directives. Fixes
issue #480.

Includes basic spec tests and updated documentation in README.md.

Note again that puppet-rspec silently drops `$1` when specifying test
values so we match `FOO` instead of `$1`. From a simple spec test
perspective there shouldn't be a difference and this is better than
having no tests at all.
Merge pull request #502 from antaflos/support_scriptaliasmatch

Add support for ScriptAliasMatch directives
Merge pull request #490 from igalic/global-sslopts

Set SSLOptions StdEnvVars in server context
Support php_admin_(flag|value)s

Add support for php_admin_flags and php_admin_values to both
<VirtualHost> and directory context. Basic documentation & tests
for both cases included.

This Fixes #463