…o attach dynamically generated data (instead from files it will be taken from a string source that represents content of the file)

* fix on popup when clicking on variant (up to now there was a console error)
* popup is a bootstrap modal window (not just old alert function)
* if possible (and requested by user), gene variant height depends on the allel frequency of specific variant

* bootstrap library removed
* when user click on gene variant instead of poup user defined function will be called (if such method is not defined log information will appear in the console)
* allel frequency is parsed in a way that maximum and minimum values are stored in vcf variant entry
* user can define strategy that should be used when hight of the gene variant bars should depend on the alle frequency, two defined strategies are:
- take max value of allel frequency for vcf entry
- take min value of allel frequency for vcf entry