Update playbooks2.rst

Added doc on encrypt capability of vars_prompt.
Assuming the example in https://github.com/ansible/ansible/blob/devel/examples/playbooks/prompts.yml is still valid.
Adds crypt scheme list for vars_prompt

Added more details on encrypt usage for vars_prompt, including a list of
crypt schemes and a ling to the passlib documentation.
Cosmetic fixes

Fixed typo in passlib URL link
Fixed style in cryp scheme list
Fixed bullet 7 in variable precedence section
Adds statement regarding passlib requirement
Update the Makefile and build-site.py to notify of missing dependencies for doc compiling
align manpages with actual code for --syntax-check
Merge pull request #2309 from r-p-e/devel

fix ansible-playbook manpges regarding option for syntax check
Merge pull request #2306 from tbielawa/docdepends

Update the Makefile and build-site.py to notify of missing dependencies
Merge pull request #2302 from leucos/patch-1

Update playbooks2.rst
Fix copyright
Merge pull request #2313 from mmoya/fix-copyright

Fix chroot.py copyright
Consider service stopped if rc is 1

Per LSB spec, consider service stopped if rc from 'service status' is 1.
Added comment with url to LSB spec reference.
Update subversion module to work better with check mode

Adds needs_update() method which will inspect the checkout for the
current revision and then the HEAD.  If the local check out is behind
HEAD, this will report changed=True and supply the revision numbers.
Minor spelling fixes
added check for starting $HOME for remote_tmp so as to non root sudo override
Signed-off-by: Brian Coca <bcoca@tablethotels.com>
Respect gem_source option if specified
Ensure template arguments if complex are still properly templated
Merge pull request #2320 from jkleckner/minor-spelling-fixes

Minor spelling fixes
Merge pull request #2318 from sfromm/issue2317

Consider service stopped if rc is 1
Merge pull request #2322 from bcoca/remote_tmp_override

added check for starting $HOME for remote_tmp so as to non root sudo override
Merge pull request #2323 from laixer/devel

Respect gem_source option if specified