Merge pull request #114 from benjaminrau/master

[BUXFIX] SortViewHelper to work with numberic properties
[DOC] Fix 'typo' in argument description
Merge pull request #117 from dreipunktnull/master

[DOC] Fix 'typo' in argument description
[BUGFIX] Reverse order __toString / Domain object id fetch

Fixes: #109
[BUGFIX] Disable cache if positive in Once and Security ViewHelpers

Fixes: #116

This change overrides the `renderThenChild` method in the abstract classes for Once and Security scope ViewHelpers. When a positive condition is encountered, the output should be considered specific to the current visitor only - achieved by simply preventing caching of the page being rendered.
[FEATURE] Asset DNS Prefetch ViewHelper

This is a special type of Asset which only generates a `<link rel="dns-prefetch" href="…" />` tag for each domain given in the `domains´ attribute (mixed, supports CSV and Iterators).
Merge pull request #118 from NamelessCoder/issue/109

[BUGFIX] Reverse order __toString / Domain object id fetch
Merge pull request #119 from NamelessCoder/issue/116

[BUGFIX] Disable cache if positive in Once and Security ViewHelpers
Merge pull request #120 from NamelessCoder/assetdnsprefetch

[FEATURE] Asset DNS Prefetch ViewHelper
[DOC] Full doc comment for Page / Header / Title ViewHelper

Fixes: #122
Merge pull request #126 from NamelessCoder/pagetitledoc

[DOC] Full doc comment for Page / Header / Title ViewHelper
[BUGFIX] Property "multiple" on Select ViewHelper is boolean

Fixes: #121
Merge pull request #127 from NamelessCoder/multipleonselect

[BUGFIX] Property "multiple" on Select ViewHelper is boolean
[BUGFIX] Set "multiple" on Select ViewHelper form argument, not tag attribute

This prevents any possible errors when using the "multiple" attribute by turning it into an argument rather than an attribute and manually setting/removing the actual tag attribute as needed.
Merge pull request #128 from NamelessCoder/multipleonselect

[BUGFIX] Set "multiple" on Select ViewHelper form argument, not tag attribute
[FEATURE] Option to return tt_content records instead of rendered elements

Added new function getRenderedRecord to separate creating record content from query to fetch tt_content records
Added new arguments to abstract View Helper: render, using to returning array of tt_content records (render true, default)

Based on #81 FluidTYPO3/flux/issues
[FEATURE] Attribute "render" to return records, Content ViewHelper.
[BUGFIX] iterator.container should also search in key of array

Fixes #123
[FEATURE] Add considerKeys as attribute of VH Iterator/Contains
Merge pull request #130 from NamelessCoder/iteratorcontains

[FEATURE] Toggle for iterator.contains to search keys instead of values