remove app cache, logs .gitkeep to ignore file
simplified a demo controller
updated VENDORS for 2.1.10
merged branch fabpot/security-simplification (PR #541)

This PR was merged into the master branch.

Discussion
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simplified a demo controller

Commits
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a55b80f simplified a demo controller
updated VENDORS for 2.3.0-BETA2
updated bundle deps to 2.3
updated version to 2.4
updated composer.json
fixed typo
Fix deprecated function bind
merged branch agiuliano/master (PR #547)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #547).

Discussion
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Fix deprecated function

In AcmeDemoController/contactAction there was the deprecated function $form->bind() instead of $form->submit()

Commits
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b83f3ba Fix deprecated function bind
updated doc links
merged branch lsmith77/patch-2 (PR #551)

This PR was merged into the 2.2 branch.

Discussion
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updated doc links

Commits
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465686c updated doc links
Remove +x mode on file
merged branch jdespatis/master (PR #545)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #545).

Discussion
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Remove +x mode on file app/logs/.gitkeep

Mode on app/cache/.gitkeep is 100644, same mode should be applied to app/logs/.gitkeep

Further more, afaik, .gitkeep doesn't aim to be a shell script

Commits
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89a18a4 Remove +x mode on file
Merge branch '2.1' into 2.2

* 2.1:
  Remove +x mode on file
  updated VENDORS for 2.1.10

Conflicts:
	composer.lock
Merge branch '2.2' into 2.3

* 2.2:
  Remove +x mode on file
  updated doc links
  updated VENDORS for 2.1.10

Conflicts:
	README.md
updated versions in the README file
Merge branch '2.3'

* 2.3:
  updated versions in the README file
  Remove +x mode on file
  updated doc links
  Fix deprecated function bind
  fixed typo
  updated composer.json
  updated VENDORS for 2.1.10
updated versions in the README file