update to new helpers location
we aren't limited to the perl versions travis provides
fix mistake in travis config
list all runtime and configure prerequisites as authordeps

Part of Moose's documentation is built by introspecting the classes.
This means we need to be able to build and run Moose itself for a dzil
build to succeed.  This hasn't been a problem until now, because we
already have Moose installed as a prerequisite of Dist::Zilla.  But when
we add prereqs, the installed prereqs aren't enough.
Merge pull request #86 from moose/topic/all-deps-as-author

list all runtime and configure prerequisites as authordeps
Move all attribute API docs to Moose::Meta::Attribute
Merge the Class::MOP::Class docs into Moose::Meta::Class
Merge Class::MOP::Instance docs into Moose::Meta::Instance
Merge Class::MOP::Method docs into Moose::Meta::Method
Merge the Class::MOP::Method::Accessor docs into Moose::Meta::Method::Accessor
Merge the Class::MOP::Method::Constructor docs into Moose::Meta::Method::Constructor
Merge the Class::MOP::Method::Meta docs into Moose::Meta::Method::Meta
Rename docGenerator.pl to doc-generator to match other script names
Tidy doc-generator code
Add SYNOPSIS to Moose::Meta::Class
Rewrote most of the exception manifest generator

This removed a lot of unused code.

I also removed the bit to get sample error messages. This relied on some very
fragile parsing of the test files. It wouldn't take much reformatting of a
test file to break it.
Replace all =item B<< ... >>> with =head2 or =head3 to improve metacpan TOC
Calculate preposition based on final tc name