schema.c: Get rid of memory leaks when dropping table and closing schema

This was a simple case of missing calls to free() and ca_table_close().

Signed-off-by: Morten Hustveit <morten.hustveit@gmail.com>
schema.c: In ca_schema_create_table, create table file if it does not exist

The file is created with mkstemp in the schema directory.

Signed-off-by: Morten Hustveit <morten.hustveit@gmail.com>
Added test case for schema table creation and deletion

Signed-off-by: Morten Hustveit <morten.hustveit@gmail.com>
.gitignore: Ignore /ca-table-lockd

Signed-off-by: Morten Hustveit <morten.hustveit@gmail.com>
Merge branch 'master' of https://github.com/mortehu/cantera-table