Install header files
Add r3.pc
my_strdup / my_strndup  malloc smaller
Merge pull request #5 from czchen/feature/install

Install headers and r3.pc
Merge pull request #6 from CindyLinz/master

my_strdup / my_strndup  malloc smaller
Update node.c

Fix
no strndup when truncating pattern
partially
delete auto-generated libtool
Add .travis ci config
test build