added docs on the slideshow block
typo
be more specific about the template overriding
Cleanup according to feedback from @dantleech - thank you
corrected format for subtitles
corrected link syntax
added sections about imagine and rendering the slideshow
Merge remote-tracking branch 'origin/master' into slideshow_docs
cleanup after refactorings, cs fixes
Fixed doc standards and made corrections

- In addition to grammer and standards the document now also says that
  you can specify a block by an absolute path.
Review fixes
Fixed closing xml
Merge pull request #124 from dantleech/block_bundle

Fixed doc standards and made corrections
Fixed Symfony docs Standards
Merge pull request #125 from WouterJ/fix_xml

[Getting Started] Fixed Symfony docs Standards and more
[getting started] Fixed line lengths
Merge pull request #126 from WouterJ/line_length

[Getting Started] Fixed line lengths
Fixed standards
document jackalope requirements. fix #120
cleanups