Normalize paths when interacting with signals

[heston]

Signal names are always paths. However, when connecting to a signal, the same path may be specified in multiple ways. For example, /foo/bar/ is the same as foo/bar for all intents and purposes. This change normalizes path names when retrieving Signals, to account for such differences.

[coveralls]

Pull Request Test Coverage Report for Build 47

• 5 of 5 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 45:	0.0%
Covered Lines:	267
Relevant Lines:	267

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 47

• 5 of 5 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

---

Totals
Change from base Build 45:	0.0%
Covered Lines:	267
Relevant Lines:	267

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 47

• 5 of 5 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

---

Totals
Change from base Build 45:	0.0%
Covered Lines:	267
Relevant Lines:	267

---

💛 - Coveralls