Accommodation names cannot contain hyphens or other special characters

[nus-pe-bot]

Steps to reproduce:

1. Clear all application data (clear)
2. add accommodation n/A-B a/A

Expected: An accommodation with the name "A-B" shows up in the panel.
Actual: An error message is thrown saying that only alphanumerics + spaces are allowed.

Some hotels contain hyphens in their title, like the Ritz-Carlton. Smaller and cheapear locales will definitely contain odder characters than hyphens.

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_{[original: Parcly-Taxel/ped#4]}