Guilhem Ané

Results 2 issues of Guilhem Ané

I am using the `ipa_bases.csv` file, and while parsing it I noticed that some vowels ([from line 116 to 121](https://github.com/dmort27/panphon/blob/56754e6de34da6a4102ee5011b3f61cf86c4ef16/panphon/data/ipa_bases.csv#L116)) have duplicates, with only one difference: the delayed release column...

Fixed Issue #72. When min_date or max_date were defined, the left and right month arrows were sometimes incorrectly disabled. Solution proposed by @kofflo was implemented for left and right arrows....