Use SymbolicLink rather than Symlink in API

Rename followInsecureSymlinks to followInsecureSymbolicLinks. This
now matches what is writhe in the readme and release notes.
Add deprecation warning for followInsecureSymlinks
Added  some specs for followInsecureSymbolicLinks.
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End promise chain
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1.10.4
Fix Host application maker

The host negotiator does not fit the pattern of the other
content negotiators, particularly since it needs different
logic for matching hosts and host patterns.
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1.10.5
Restore support for host negotiation terms
1.10.6
This closes kriskowal/q-io#65 (70 tests, 134 assertions, 0 failures, 0 skipped)
This closes kriskowal/q-io#65 (changed dstExists to targetExists as per standards)
Merge pull request #69 from nerfin/v1

Allows copyTree to be applied over existing directory trees.
Fixes #65
Add specs for http range header.

According to
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1
Fix host negotiation

This reintroduces the "host" to "request.terms" if a host is
successfully negotiated, to notify downstream apps of which host pattern
matched.
Fix range content HTTP requests

Further work needed to be fully conformant, particularly for multiple,
non-contiguous range requests; and multiple, mixed-validity range
requests.
Merge pull request #79 from kriskowal/range-fix

Range fix