implicit declaration of function ‘trimcharacter’

[pablomtzunc]

When trying to compile Ulfius as a static archive:

ulfius/src$ make static

Get error:

implicit declaration of function ‘trimcharacter’ 
ulfius.c: In function ‘ulfius_remove_endpoint’

Thanks,
Pablo

[pablomtzunc]

Manual installation as stated in installation.md fixed