Reproduce issue #247 (cause is #252); yeyy
Fixes issue #247 and #252; yeyy; Is this too dirty?
Merge branch 'develop' of https://github.com/syncany/syncany into feature/issue192
Merge branch 'bugfix/issue247' into develop
Update CHANGELOG.md
Add log for GUI command
If --log not given, log to user log dir by default, relates to #258
Update CHANGELOG.md
Update CHANGELOG.md
Allow the usage of generic and nested transfer plugins

This version allows to use generic plugins as nested ones. The user is
asked which plugin he wants to use for e.g. the creation of a raid. It
also supports the non-interactive initialization of plugins using the
new, magic parameter <fieldname>-tpt as plugin parameter.

TransferPluginUtil now offers a way to find the transfer plugin
implementation for a transfer settings class.

Furthermore this commit fixes a bug when setting null values as
setting values.
Merge branch 'develop' of https://github.com/syncany/syncany into feature/issue192
Add RAID0 plugin, and merge develop