[BUGFIX] Support for templateRootPath not being in an extension

Fixes: #215
[TASK] Enable renderMode, itemListStyle and selectedListStyle on Select

This change adds and passes through additional TCEforms configuration to control how Select fields are rendered and styled.
[DOC] Improve description of argument renderMode on Select ViewHelper
Merge pull request #217 from NamelessCoder/rootpath

[BUGFIX] Support for templateRootPath not being in an extension
Merge pull request #218 from NamelessCoder/selectmodes

[TASK] Enable renderMode, itemListStyle and selectedListStyle on Select