deprecating AnnotationsBag::merge, creating AnnotationsBag::union
closes #28
multiline values support, closes #16

squash of:
- multiline values support
- reduced regex backtracking
- code style, fixed long lines
activating test for deprecated AnnotationsBag::merge method
Fixed typos
Merge pull request #30 from pborreli/typos

Fixed typos [skip ci]
updated roadmap, added license badge [skip ci]
Prefixing PHP-Doc @return tags with a backslash. PHPStorm was unable to follow resolve the internal "Minime" namespace without it.
Merge pull request #31 from romainbessugesmeusy/master

fixing docs for better IDE support
added tests for concrete annotations
Update Parser.php

Fixes: types pattern regex capturing values that begin with a value type (ex. "stringed")
Merge branch 'master' of https://github.com/emaphp/annotations into develop
adding test so #32 will not come back, fixes #32 and closes #33
removed strscan dependency
update install instructions with a newer recommended version

[skip ci]
concrete annotations, closes #18
Merge branch 'concrete' into develop
HHVM 2.4+ support :) solves #19
class level parser types #17
better concrete annotations +tests #18
AnnotationsBag::get|grep|useNamespace full concrete annotations support