Fix curl syntax

No spurious hyperlink on examples, and no suggestion to run the commands
as root.
Also remove curl local examples
Uniformize titles

Start with uppercase, do not end with a colon.
Merge pull request #279 from RandolfCarter/stable6

Yet another adaptation of manual install instructions
Fix wording
Conflicts:
	developer_manual/bugtracker/index.rst
Merge pull request #284 from DavidPrevot/curl

Fix curl syntax
Clean up according to comments

https://github.com/owncloud/documentation/commit/7d07fa3d58dacf524723f55b508a16c198d8eba1
https://github.com/owncloud/documentation/commit/0a9a5ccdad7174e31e41af0eae7e7a0a060bf5f6
Fix wording
remove misplaced sync client docs
Move web_guide to user manual, still needs linking
fix heading
Add config file chapter
Fix warnings
Add config file chapter to index.rst
remove find statement, this will delete you data and config folder, issue #295
Fix imported chapters, improve headings
Fix web guide structure
fix heading
correct handeling of 404 error
refer to http://wiki.nginx.org/HttpCoreModule#try_files
tested on my system
fixing core#6765