Fix directive.

Why didn't --amend add this to the previous commit?
Update source/index.rst

minor spelling and grammar corrections
Merge pull request #117 from holdenhao/patch-1

Update source/index.rst
migrated my 'About Instances and Threads, Performance and RAM consumption' to collective docs
cleanup: whitespaces
more cleanup in zope.rst
Update source/reference_manuals/active/writing/crosslinking.rst

Fixed developers -> developer
Update source/sessions/cookies.rst

Signing cookies pointer
Update source/getstarted/debug_mode.rst
Update source/getstarted/index.rst

Fixed debug mode link
Update source/getstarted/debug_mode.rst

Some more clarifications what debug mode does
Update source/getstarted/debug_mode.rst

porta_css/javascript pointers
Update source/getstarted/debug_mode.rst

Refresh issues - more info
Update source/getstarted/debug_mode.rst
Update source/performance/tips.rst

Added profiling section
fix: link to issue tracker
first stab at new-style queries
Merge branch 'master' of github.com:collective/collective.developermanual
wording, plus a little more detail wrt. setting params
Fix various typos