Short-circuiting comment posting if textbox is empty

Fixed search location bug

Updated 1.0.2 to include treekey non-root url updates

v1.0.2 commit

Features:
- OpenTreeMap can now be mounted on non-root urls
- Allow OpenTreeMap to be contained in a virtual environment when running under Apache

Security:
- Patched a possible remote code execution issue (90351a6)

Bugs:
- Fixed a reverse geocode error when updating tree location (63759e3)

initial version