some bug fixes
Merge pull request #122 from KeenS/hotfix

some bug fixes
fix #123. add another build option 'USE_C11_FEATURE'
add reference to botbot.me
move pic_import and pic_export to lib.c
support renaming export
Match the case of package name for find_package.

This mismatch causes build failure on Linux.

Signed-off-by: OGINO Masanori <masanori.ogino@gmail.com>
Merge pull request #126 from omasanori/findlibedit

Match the case of package name for find_package.