Remove specific version number for L10NSharp

There is no reason to specify the version number here because
we get L10NSharp from the libpalaso build on TeamCity.
Make backslash work in longpress
Merge pull request #43 from andrew-polk/NoL10NSharpSpecificVersion

Remove specific version number for L10NSharp
Make Upload depend on SignInstaller which depends on Installer
Merge pull request #44 from andrew-polk/LongPressBackslash

Make backslash work in longpress