added processing of regexp in attr "name"
fixed 2 mistakes
deleted extra console.log
Added the ability to put exp in attr "name" and in attr "value" in f:attribute
3 operators are concatenated
added tests for fest:element
added forgotten template with error
Merge pull request #85 from bruderschaft/issue-63_1

Replace `select` attribute by inline expressions in `name` attribute (Resolves #63)