HyMacroExpansionError shouldn't truncate message

For example:

```
$ hy
hy 0.10.1 using CPython(default) 2.7.8 on Darwin
=> (defmacro hi [] (raise (TypeError "This message will be truncated")))
=> (hi)
  File "<input>", line 1, column 1

  (hi)
  ^--^
HyMacroExpansionError: `hi' message will be truncated
````
Added explanation on Hy <-> Python interop
Added @Tritlo to Authors
Merge branch 'master' of https://github.com/Tritlo/hy into Tritlo-master
Tweak Python interop section a bit.
Merge pull request #694 from michaelmaltese/patch-1

HyMacroExpansionError shouldn't truncate message
Remove Python 3.2 from classifiers.
Add clint as a dependency.

Since clint 0.3, it supports Python 3.
Fixes to language documentation

- Use backticks consistently for inline code
- Capitalize section headers and proper nouns
- Minor grammatical fixes
Fixes to contributor module documentation

- Changed "Contrib" to "Contributor"
- Fixed mismatched inline code in list* usage
- Added missing hyperlink targets
Add macro expansion in defclass
Change documentation code block language to Hy
Adhere to CPython's documentation guidelines

- Inline code is written using ``double backticks``
- Italicized text uses *asterisks* rather than `single backticks`
- Function parameters are italicized rather than written as inline code
Merge pull request #704 from iKevinY/doc-changes

Fixes to documentation (language & contributor modules)
Merge pull request #701 from berkerpeksag/remove-3.2

Remove Python 3.2 from classifiers.
Merge pull request #702 from berkerpeksag/add-clint

Add clint as a dependency.
Fixes a long-standing bug in import under Python 3.3 and later.

Our MetaImporter was being inserted at the end of sys.meta_path.
For Python prior to 3.3, this was fine since sys.meta_path
was empty by default. As of the completion of PEP 302 in Py3.3 and
later, there are several importers registered by default. One of
these was trying (and failing) to import simple Hy modules,
resulting in a failure to import anything inside __init__.hy.

This change simply inserts the Hy-specific importer at the front
of the list.

This was noted in issue #620 (great catch @algernon)
Merge branch 'master' into pr/706
Merge branch 'master' into pr/705
Miscellaneous changes to README

- Updated badges to utilize Shields
- Added alt-text to images
- Changed version/downloads badges to link to PyPI
- Use Markdown list to enumerate Hylarious Hacks