Updating some README grammar

Conflicts:

	README.md
Merge pull request #6 from richardmiller/patch-2

Updating some README grammar
Fixed typos
Merge pull request #7 from pborreli/typos

Fixed typos
Fix unparsable version constraint in README.md
Fix namespace for MethodNotFoundException

Currently, I get:

PHP Fatal error: Class 'Prophecy\Exception\Prophecy\MethodNotFoundException' not found in /[...]/vendor/phpspec/prophecy/src/Prophecy/Doubler/Generator/ClassCreator.php(48) : eval()'d code on line 22

I believe this exception should be `\Prophecy\Exception\Doubler\MethodNotFoundException`.
Merge pull request #9 from gunnarlium/patch-1

Fix namespace for MethodNotFoundException
Merge pull request #8 from gunnarlium/master

Fix typo in documentation
Fix misleading exception messages in callback prediction/promise
Extract calls stringifier into StringUtil
Add more debug informatino to prediction exception messages
Add changelog
Fix broken spec
Add contributing doc
Add missing doc block to stringifyCalls

[ci skip]
Normalize the nowdoc string before running `shouldBe`
Merge pull request #10 from bcen/master

Fix un-normalized nowdoc string
Fixed typo in ObjectProphecy's magic setter
Merge pull request #11 from bcen/master

Fixed typo in ObjectProphecy's magic setter
Make ReflectionClass::newInstance method arguments optional