Merge pull request #813 from dirkluijk/master

Implemented prefix/suffix options [issue #812]
[softdeletable] Added timeAware option
[softdeletable] Improved SQL query of timeAware option
[softdeletable] Improved SQL query of timeAware option again
[softdeleteable] some adjustments to orm filter
[xml schema] update based on #813
[tree] closes #814
[tests] update a test based on #814
[uploadable] suppress unlink warnings, closes #819
fix bug left in nested set
Merge pull request #820 from folliked/patch-1

fix bug left in nested set
bugfix for when changeset doesnt have the usual pair of old-new values
Merge pull request #830 from tiagojsag/tree_update_changeset_bugfix

Bugfix for when changeset doesnt have the usual pair of old-new values
fix bug when parsing xml config for boolean values in SoftDeletable
Merge pull request #831 from tiagojsag/xml_boolean_fix

[SoftDeletable] fix bug when parsing xml config for boolean values in SoftDeletable
xml bool attr parse fix
Merge pull request #832 from tiagojsag/xml_boolean_fix

_getBooleanAttribute() improvement and refactored PR 831
remove unused vars
Merge pull request #844 from aidev/master

remove unused vars
Enables setting a foreign key as a unique_base for Sluggable behaviour