Try to find the default tools by globbing
Try to find the default tools by globbing
Add BasicStringHelper module
Add Fake.EnvironmentHelper.encoding

Current version FAKE always uses Encoding.Default for IO access.
Encoding.Default returns Shift_JIS using Japanese Windows.
Shift_JIS is incompatible to Unicode.
But we usually use utf-8 for source code.
So I add "encoding" build parameter.
Merge pull request #164 from hafuu/default-encoding

add "encoding" build parameter
Removing the BasicStringHelper in order to fix the breaking change. Relates to issue #164