POD stripping and usage text
Make env binding a private method
Merge prepend, notest and cpanfile requirements

This finally gives use notest for prepend, keeps all version information
even if it comes from different sources (e.g. prepend now uses version
requirements from cpanfile if no other is given).

Also expose options in mpan-install to manipulate this composition.
Add version info to help text
Checking in changes prior to tagging of version 0.30.

Changelog diff is:

diff --git a/Changes b/Changes
index c5062d0..e1d5e1f 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,15 @@ Revision history for App::Mist

 {{$NEXT}}

+0.30 2014-03-29T04:51:33Z
+
+  - Full merging of prepend, notest and cpanfile requirements
+    This finally gives use notest for prepend, keeps all version information
+    even if it comes from different sources (e.g. prepend now uses version
+    requirements from cpanfile if no other is given).
+
+  - Display usage text and version info with ./mpan-install --help
+
 0.29 2014-03-29T01:32:19Z

   - Removed all instances of PERLBREW_HOME, it is not needed for mist